From the official US Scrabble dictionary:
3-letter words
qat, qua
4-letter words
aqua, qaid, qats, qoph, quad, quag, quai, quay, quey, quid, quin, quip, quit, quiz, quod
5-letter words
aquae, aquas, equal, equip, faqir, fique, maqui, pique, qaids, qanat, qophs, quack, quads, quaff, quags, quail, quais, quake, quaky, quale, qualm, quant, quare, quark, quart, quash, quasi, quass, quate, quays, quean, queen, queer, quell, quern, query, quest, queue, queys, quick, quids, quiet, quiff, quill, quilt, quins, quint, quips, quipu, quire, quirk, quirt, quite, quits, quods, quoin, quoit, quota, quote, quoth, qursh, roque, squab, squad, squat, squeg, squib, squid, toque, tranq, tuque, umiaq, usque
6-letter words
acquit, barque, basque, bisque, bosque, buqsha, caique, calque, casque, cheque, cinque, cirque, claque, clique, cliquy, cloque, coquet, diquat, equals, equate, equine, equips, equity, exequy, faqirs, faquir, fiques, liquid, liquor, loquat, manque, maquis, marque, masque, mosque, opaque, piqued, piques, piquet, plaque, pulque, qanats, qindar, qintar, qiviut, quacks, quaere, quaffs, quagga, quaggy, quahog, quaich, quaigh, quails, quaint, quaked, quaker, quakes, qualia, qualms, qualmy, quango, quanta, quants, quarks, quarry, quarte, quarto, quarts, quartz, quasar, quatre, quaver, queans, queasy, queazy, queens, queers, quells, quench, querns, quests, queued, queuer, queues, quezal, quiche, quicks, quiets, quiffs, quills, quilts, quince, quinic, quinin, quinoa, quinol, quinsy, quinte, quints, quippu, quipus, quired, quires, quirks, quirky, quirts, quitch, quiver, quohog, quoins, quoits, quokka, quorum, quotas, quoted, quoter, quotes, quotha, qurush, requin, risque, roques, roquet, sacque, sequel, sequin, squabs, squads, squall, squama, square, squash, squats, squawk, squeak, squeal, squegs, squibs, squids, squill, squint, squire, squirm, squirt, squish, squush, toques, toquet, torque, tranqs, tuques, ubique, umiaqs, unique, usques, yanqui
7-letter words
acequia, acquest, acquire, acquits, alfaqui, aliquot, antique, aquaria, aquatic, aquavit, aqueous, aquifer, aquiver, asquint, banquet, baroque, barques, basques, bequest, bezique, bisques, bosques, bosquet, bouquet, briquet, brusque, buqshas, cacique, caiques, calqued, calques, casqued, casques, cazique, charqui, chequer, cheques, cinques, cirques, claquer, claques, cliqued, cliques, cliquey, cloques, coequal, conquer, coquets, coquina, coquito, croquet, croquis, cumquat, diquats, enquire, enquiry, equable, equably, equaled, equally, equated, equates, equator, equerry, equines, equinox, equites, esquire, faquirs, inquest, inquiet, inquire, inquiry, jonquil, kumquat, lacquer, lacquey, liquate, liquefy, liqueur, liquids, liquify, liquors, loquats, macaque, marquee, marques, marquis, masquer, masques, mesquit, mezquit, mosques, oblique, obloquy, obsequy, opaqued, opaquer, opaques, oquassa, parquet, pasquil, perique, picquet, piquant, piquets, piquing, piroque, plaques, pulques, qindars, qintars, qiviuts, quacked, quadded, quadrat, quadric, quaeres, quaffed, quaffer, quaggas, quahaug, quahogs, quaichs, quaighs, quailed, quakers, quakier, quakily, quaking, qualify, quality, quamash, quangos, quantal, quanted, quantic, quantum, quarrel, quartan, quarter, quartes, quartet, quartic, quartos, quasars, quashed, quasher, quashes, quasses, quassia, quassin, quatres, quavers, quavery, quayage, queened, queenly, queered, queerer, queerly, quelled, queller, querida, queried, querier, queries, querist, quested, quester, questor, quetzal, queuers, queuing, quezals, quibble, quiches, quicken, quicker, quickie, quickly, quieted, quieten, quieter, quietly, quietus, quillai, quilled, quillet, quilted, quilter, quinary, quinate, quinces, quinela, quinina, quinine, quinins, quinnat, quinoas, quinoid, quinols, quinone, quintal, quintan, quintar, quintes, quintet, quintic, quintin, quipped, quippus, quiring, quirked, quirted, quitted, quitter, quittor, quivers, quivery, quixote, quizzed, quizzer, quizzes, quohogs, quoined, quoited, quokkas, quomodo, quondam, quorums, quoters, quoting, qurshes, racquet, reequip, relique, request, requiem, requins, require, requite, roquets, rorqual, sacques, sequela, sequels, sequent, sequins, sequoia, siliqua, silique, squabby, squalid, squalls, squally, squalor, squamae, squared, squarer, squares, squashy, squatly, squatty, squawks, squeaks, squeaky, squeals, squeeze, squelch, squiffy, squilla, squills, squinch, squinny, squints, squinty, squired, squires, squirms, squirmy, squirts, squishy, squoosh, tequila, toquets, torqued, torquer, torques, unequal, uniquer, uniques, unquiet, unquote, vaquero, yanquis
8-letter words
acequias, acquaint, acquests, acquired, acquirer, acquires, adequacy, adequate, aequorin, alfaquin, alfaquis, aliquant, aliquots, antiqued, antiquer, antiques, applique, aquacade, aquanaut, aquarial, aquarian, aquarist, aquarium, aquatics, aquatint, aquatone, aquavits, aqueduct, aquifers, aquiline, arquebus, banquets, barbeque, baroques, bedquilt, beliquor, bequeath, bequests, beziques, biunique, bosquets, bouquets, boutique, briquets, brusquer, caciques, calquing, caziques, chaqueta, charquid, charquis, chequers, cinquain, claquers, claqueur, cliquier, cliquing, cliquish, coequals, coequate, colloquy, conquers, conquest, conquian, coquetry, coquette, coquille, coquinas, coquitos, cotquean, critique, croquets, cumquats, daiquiri, disquiet, eloquent, enquired, enquires, equaling, equalise, equality, equalize, equalled, equating, equation, equators, equinely, equinity, equipage, equipped, equipper, equiseta, equitant, equities, equivoke, esquired, esquires, exequial, exequies, frequent, henequen, henequin, heniquen, illiquid, inequity, iniquity, inquests, inquiets, inquired, inquirer, inquires, jacquard, jonquils, kumquats, lacquers, lacqueys, liquated, liquates, liqueurs, liquidly, liquored, macaques, maquette, marquees, marquess, marquise, masquers, mesquite, mesquits, mezquite, mezquits, miquelet, misquote, moquette, moresque, mosquito, musquash, mystique, nonequal, nonquota, obliqued, obliques, oldsquaw, opaquely, opaquest, opaquing, oquassas, outquote, paraquat, paraquet, paroquet, parquets, pasquils, periques, physique, picquets, piquancy, piroques, postique, pratique, qindarka, quackery, quacking, quackish, quackism, quadding, quadplex, quadrans, quadrant, quadrate, quadrats, quadrics, quadriga, quadroon, quaestor, quaffers, quaffing, quaggier, quagmire, quagmiry, quahaugs, quaiches, quailing, quainter, quaintly, quakiest, qualmier, qualmish, quandang, quandary, quandong, quantics, quantify, quantile, quanting, quantity, quantize, quantong, quarrels, quarried, quarrier, quarries, quartans, quartern, quarters, quartets, quartics, quartile, quartzes, quashers, quashing, quassias, quassins, quatorze, quatrain, quavered, quaverer, quayages, quaylike, quayside, queasier, queasily, queazier, queendom, queening, queerest, queering, queerish, quellers, quelling, quenched, quencher, quenches, quenelle, quercine, queridas, queriers, querists, querying, questers, questing, question, questors, quetzals, queueing, quezales, quibbled, quibbler, quibbles, quickens, quickest, quickies, quickset, quiddity, quidnunc, quietens, quieters, quietest, quieting, quietism, quietist, quietude, quillaia, quillais, quillaja, quillets, quilling, quilters, quilting, quincunx, quinelas, quinella, quiniela, quininas, quinines, quinnats, quinoids, quinolin, quinones, quinsies, quintain, quintals, quintans, quintars, quintets, quintics, quintile, quintins, quipping, quippish, quipster, quirkier, quirkily, quirking, quirting, quisling, quitches, quitrent, quitters, quitting, quittors, quivered, quiverer, quixotes, quixotic, quixotry, quizzers, quizzing, quoining, quoiting, quomodos, quotable, quotably, quotient, qurushes, racquets, ramequin, reequips, reliques, remarque, requests, requiems, required, requirer, requires, requital, requited, requiter, requites, roqueted, rorquals, seaquake, sequelae, sequence, sequency, sequents, sequined, sequitur, sequoias, siliquae, siliques, soliquid, squabble, squadded, squadron, squalene, squalled, squaller, squalors, squamate, squamose, squamous, squander, squarely, squarers, squarest, squaring, squarish, squashed, squasher, squashes, squatted, squatter, squawked, squawker, squeaked, squeaker, squealed, squealer, squeegee, squeezed, squeezer, squeezes, squegged, squelchy, squibbed, squidded, squiffed, squiggle, squiggly, squilgee, squillae, squillas, squinted, squinter, squireen, squiring, squirish, squirmed, squirmer, squirrel, squirted, squirter, squished, squishes, squooshy, squushed, squushes, tequilas, torquate, torquers, torquing, tranquil, turquois, ubiquity, unequals, uniquely, uniquest, unquiets, unquoted, unquotes, usquabae, usquebae, vanquish, vaqueros
qabala. qadi. qaid. qanat. qat.
qi
equestrian
· Qatar (a country)
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern Q----Q--. That is, eight letter words with 1st letter Q and 6th letter Q. In alphabetical order, they are: qaimaqam
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern Q---Q---A. That is, nine letter words with 1st letter Q and 5th letter Q and 9th letter A. In alphabetical order, they are: quinquina
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern Q-I-Q----. That is, nine letter words with 1st letter Q and 3rd letter I and 5th letter Q. In alphabetical order, they are: quinquina
· quixotic
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern Q--M-Q---. That is, nine letter words with 1st letter Q and 4th letter M and 6th letter Q. In alphabetical order, they are: qaimaqams
If what you want is a list of words using the letter Q you could go with a Scrabble word finder. That will show words that start with Q as well as words that contain the letter Q.
These are the options: Tranq Umiaq Suq
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern QAI--Q---. That is, nine letter words with 1st letter Q and 2nd letter A and 3rd letter I and 6th letter Q. In alphabetical order, they are: qaimaqams
ANSWERQuoANSWERThere is no valid three (3) letter word allowable in scrabble that starts with Q except a three letter word that end with Q which is SUQ.