ABBA, anna, arra, boob, deed, ecce, egge, elle, emme, erre, esse, kook, level, naan, neen, noon, obbo, oppo, otto, peep, poop, sees, teet, toot.
Four letter words:theytidytinytobytonytorytraytroy
Some four letter words that end with "o" are:zerohaloherohobointojudokiloalsoaltoautoechomemoontopolosilosolotacotarotrioundoveto
Some four letter words that start with WR are:wrapwrenwrit
Some four letter words with the first letter f are:facefadefailfairfallfamefarmfastfearfeedfeelfeetfestfilefillfilmfinefirefirmfishfistflapflatflewflitflipflitflopfluefoalfoamfoldfolkfoodfoolfootforkformfortfourfrayfreefretfromfuelfullfumefuryfussfuzz
Some four letter words that end in H are:bathwashwishbashhashhushmushpithmythhathpushpath
refer
loads of them, you wont know how many but who cares but there thousands and thousands of Palidromes in the world, so I'm just guessing
Some Four Letter Words:AideApexAtomBakeBalmBandBaseBeakBeauBentBikeBindBiteBondBoneCakeCallCapeColdCoolDataDateDeliDillDoorEarnEaseEastEasyEyreFailFallFartFateFellFileFillFireFleaFleeFortFromFullGaleGallGateGillGladGoldGolfGulfGullHallHaltHateHealHearHeatHeelHereHillHiltIambIckyIdeaIdleIdlyIntoIronKeelKiltKiteLaidLakeLambLameLaneLateLawnLeakLeekLikeLongLoveMadeMakeMaskMateMeatMeetMeteNapeNaveNavyNearNewtNiceNoseNosyNovaOnceOntoOnyxOpalOpenOvalOvenPalePalmParePealPearPeelPeerPierPleaRaidRateRealReelRoadRoilRoleRollSailSaleSameTailTaleTalkTallTaskTearTierTileToadToilUntoUponVaseVestViceVoidWailWaleWalkWallYourZoom
686, 767, 848, and 929
Four letter words:theytidytinytobytonytorytraytroy
Some four letter words that end with "o" are:zerohaloherohobointojudokiloalsoaltoautoechomemoontopolosilosolotacotarotrioundoveto
Some four letter words that start with WR are:wrapwrenwrit
Some four letter words that start with E are:eachearneaseeasteasyechoecruedgeeditelseemitenvyepicetcheuroeveneverevilexamexit
Some four letter vegetables are:beanbeetcornkaleokratarowort
Some four letter words beginning with TO are:toadtoiltoldtolltooktooltoottorntosstorttourtown
Some four letter J words are:jackjadejailJakejapejazzjeerjerkjestjiltJilljinxjivejoeyjohnjoinjokejoshjudojumpjunkjuryjustjute
Some four letter words with the first letter f are:facefadefailfairfallfamefarmfastfearfeedfeelfeetfestfilefillfilmfinefirefirmfishfistflapflatflewflitflipflitflopfluefoalfoamfoldfolkfoodfoolfootforkformfortfourfrayfreefretfromfuelfullfumefuryfussfuzz