Here are a few of them :)
Army Jury Pity Pony Duty Fury Bury Puny
invoices, references, sacrifices
Some 4 letter Christmas words are:treegiftbellwishloveshopsnowsale
they're there their =)
They all contain the letter o. They are all one-syllable words.
Four-letter words ending with K:amokbackbalkbankbarkbaskbeakbeckbilkbockbookbuckbulkbunkcaskcockconkcookcorkdankdarkdeckdeskdirkdiskdockduckdunkduskfinkflakfolkforkfunkgawkgeekgunkhackhankharkhawkhickhockhonkhookhulkhunkhuskjackjerkjockjunkkickkinkkirklacklanklarkleakleeklicklinklocklooklucklurkmackmarkmaskmeekmickmilkminkmockmonkmuckmurkmusknecknicknookoinkpackparkpeakpeckpeekperkpickpinkpockporkpuckpunkrackrankreekrickrinkriskrockrookruckrusksacksankseeksicksilksinksoaksocksucksulksunktacktalktanktaskteakticktnpktooktrektucktuskwalkweakweekwickwinkworkyankyolk
Here are some 6 letter words ending with T:absentassentbulletcarrotclientdeportdesertdecentexpertexportexpertforgetfaucetferretfreightgobletheighthornetindentimportimpartjacketknightlatentlariatlocustlatestmalletmarketmagnetmaggotnitwitnonfatorientoccultoffsetoutletoutfitpotentpatentpulpitpocketparentparrotpelletresultresortresentrepentregretrelentsecretscriptsplintsquintsummitsquirtspirittalentunseatvacantvelvetwalletyogurt
3 letter words ending with double letters: * add * ass * all * bee * boo * coo * ebb * egg * err * fee * ill * moo * odd * off * see * too * tee * wee * zoo
an on in are all 2 letter words ending in N.
data
Motion is all I can think of
treat
blimpchampchimpchirpclampchompclumpcrampcreepcrimpfrumpgrumpplumpprimppolyprecapskimpsloopsleepslurpstampstripstompstumpslumpswamptramptrumpuncap
pizzazz, razzmatazz, and all that jazz
areablabdeedkickkooknounsaysdeadhighhaththatbombtiltpumpsitsnon(french)pulppropfluffhushGrogbobb
Sunrisesspaciousstudioussensuoussonorousscissorssleeplessstraplessshiftlessshirtlessshinglessightlesssalacious
Configurationalsadisarfigneutonjamedmonkeyej. That is one of them I know of.