4-letter words
abut, ague, alum, amus, anus, aqua, arum, auks, auld, aunt, aura, auto, babu, baud, beau, bhut, blue, blur, bout, brut, bubo, bubs, buck, buds, buff, bugs, buhl, buhr, bulb, bulk, bull, bumf, bump, bums, bund, bung, bunk, bunn, buns, bunt, buoy, bura, burd, burg, burl, burn, burp, burr, burs, bury, bush, busk, buss, bust, busy, buts, butt, buys, buzz, caul, chub, chug, chum, club, clue, coup, crud, crus, crux, cube, cubs, cuds, cued, cues, cuff, cuif, cuke, cull, culm, cult, cups, curb, curd, cure, curf, curl, curn, curr, curs, curt, cusk, cusp, cuss, cute, cuts, daub, daut, doum, dour, doux, drub, drug, drum, duad, dual, dubs, duce, duci, duck, duct, dude, duds, duel, dues, duet, duff, dugs, duit, duke, dull, duly, duma, dumb, dump, dune, dung, dunk, duns, dunt, duos, dupe, dups, dura, dure, durn, duro, durr, dusk, dust, duty, eaux, ecru, ecus, emeu, emus, etui, euro, faun, faux, feud, feus, flub, flue, flus, flux, foul, four, frug, fubs, fuci, fuds, fuel, fugs, fugu, fuji, full, fume, fumy, fund, funk, funs, furl, furs, fury, fuse, fuss, futz, fuze, fuzz, gaud, gaum, gaun, gaur, genu, geum, glue, glug, glum, glut, gnus, gout, grub, grue, grum, guan, guar, guck, gude, guff, guid, gulf, gull, gulp, guls, gums, gunk, guns, guru, gush, gust, guts, guvs, guys, habu, haul, haut, hour, hubs, huck, hued, hues, huff, huge, hugs, huic, hula, hulk, hull, hump, hums, hung, hunh, hunk, huns, hunt, hurl, hurt, hush, husk, huts, iglu, jauk, jaup, jehu, jeux, jouk, juba, jube, judo, juga, jugs, juju, juke, jump, junk, jupe, jura, jury, just, jute, juts, kagu, knur, kudo, kudu, kues, kuru, laud, leku, leud, lieu, litu, loud, loup, lour, lout, luau, lube, luce, luck, lude, lues, luff, luge, lugs, lull, lulu, lump, lums, luna, lune, lung, lunk, lunt, luny, lure, lurk, lush, lust, lute, luvs, luxe, maud, maul, maun, maut, menu, meou, moue, much, muck, muds, muff, mugg, mugs, mule, mull, mumm, mump, mums, mumu, muns, muon, mura, mure, murk, murr, muse, mush, musk, muss, must, mute, muts, mutt, neuk, neum, noun, nous, nubs, nude, nuke, null, numb, nuns, nurd, nurl, nuts, onus, opus, ouch, ouds, ouph, ours, oust, outs, ouzo, ovum, pfui, phut, plug, plum, plus, pouf, pour, pout, prau, pubs, puce, puck, puds, puff, pugh, pugs, puja, puke, pula, pule, puli, pull, pulp, puls, puma, pump, puna, pung, punk, puns, punt, puny, pupa, pups, pure, puri, purl, purr, purs, push, puss, puts, putt, putz, quad, quag, quai, quay, quey, quid, quin, quip, quit, quiz, quod, rhus, roue, roup, rout, roux, rube, rubs, ruby, ruck, rudd, rude, rued, ruer, rues, ruff, ruga, rugs, ruin, rule, rump, rums, rune, rung, runs, runt, ruse, rush, rusk, rust, ruth, ruts, saul, scud, scum, scup, scut, shul, shun, shut, skua, slub, slue, slug, slum, slur, slut, smug, smut, snub, snug, souk, soul, soup, sour, sous, spud, spue, spun, spur, stub, stud, stum, stun, suba, subs, such, suck, sudd, suds, sued, suer, sues, suet, sugh, suit, sulk, sulu, sumo, sump, sums, sung, sunk, sunn, suns, supe, sups, sura, surd, sure, surf, suss, swum, tabu, taus, taut, thou, thru, thud, thug, thus, tofu, tolu, tour, tout, true, trug, tuba, tube, tubs, tuck, tufa, tuff, tuft, tugs, tuis, tule, tump, tuna, tune, tung, tuns, tups, turf, turn, tush, tusk, tuts, tutu, udos, ughs, ugly, ukes, ulan, ulna, ulus, ulva, umbo, umps, unai, unau, unbe, unci, unco, unde, undo, undy, unit, unto, upas, upby, updo, upon, urbs, urds, urea, urge, uric, urns, ursa, urus, used, user, uses, utas, uvea, vatu, vaus, vugg, vugh, vugs, wauk, waul, waur, yaud, yaup, yeuk, your, yuan, yuch, yuck, yuga, yuks, yule, yurt, zebu
3-letter words
amu, auk, bub, bud, bug, bum, bun, bur, bus, but, buy, cub, cud, cue, cum, cup, cur, cut, dub, dud, due, dug, dui, dun, duo, dup, eau, ecu, emu, feu, flu, fou, fub, fud, fug, fun, fur, gnu, gul, gum, gun, gut, guv, guy, hub, hue, hug, huh, hum, hun, hup, hut, jeu, jug, jun, jus, jut, kue, leu, lug, lum, luv, lux, mud, mug, mum, mun, mus, mut, nub, nun, nus, nut, oud, our, out, piu, pub, pud, pug, pul, pun, pup, pur, pus, put, qua, rub, rue, rug, rum, run, rut, sau, sou, sub, sue, sum, sun, sup, tau, tub, tug, tui, tun, tup, tut, tux, udo, ugh, uke, ulu, umm, ump, uns, upo, ups, urb, urd, urn, use, uta, uts, vau, vug, wud, you, yuk, yum, yup
There are two valid Scrabble words consisting of the letter abbelu - these are bauble and bubale - the latter of which is a variety of North African antelope.
Some Scrabble words that start with U are:upususeunderuncleurineuntoundounclearunnecessaryumbrellaurgentuglyusefulumberutilityunusualunguentuniversalupperundulyundecidedutmostunitunmanageable
Some six letter words that end in U are:bureaugateaulandaumilieumuumuu
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern ----U-U. That is, seven letter words with 5th letter U and 7th letter U. In alphabetical order, they are: seppuku
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern ----U-U-U. That is, nine letter words with 5th letter U and 7th letter U and 9th letter U. In alphabetical order, they are: ahuruhuru
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --U-UU-. That is, seven letter words with 3rd letter U and 5th letter U and 6th letter U. In alphabetical order, they are: muumuus
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern --U--U-A-. That is, nine letter words with 3rd letter U and 6th letter U and 8th letter A. In alphabetical order, they are: avuncular opuscular squamulas
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern U-A-U----. That is, nine letter words with 1st letter U and 3rd letter A and 5th letter U. In alphabetical order, they are: unabusive unamusing
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern A--U-U---. That is, nine letter words with 1st letter A and 4th letter U and 6th letter U. In alphabetical order, they are: annuluses arbutuses arduously
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern U--U--A-. That is, eight letter words with 1st letter U and 4th letter U and 7th letter A. In alphabetical order, they are: unvulgar usquabae usquebae
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern -A--U-U--. That is, nine letter words with 2nd letter A and 5th letter U and 7th letter U. In alphabetical order, they are: saeculums vasculums
The only English Scrabble word is zuz.
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern ---U---U. That is, eight letter words with 4th letter U and 8th letter U. In alphabetical order, they are: froufrou sucuruju surucucu tucutucu