agar, beat, clap, dram, exam, feat, grab, hear, imam, Jean, koan, leap, meat, neat, opal, pear, quay, reap, seat, that, unau, veal, wear, x-ray, year, zeal
Four letter words with X as the third letter:boxyfoxyluxenextpoxysexytaxitextwaxy
Skin
gain.
Some four letter words with O as the third letter are:aloeanonatomblobblotblowbookboomboonboorbootbrowbuoychopchowclodclogclotcloycookcoolcropdoomdoordropflogflopflowfoodfoolfootfrogfromglowgoodgoofgrowhoodhoofhookhoopiconidolironknobknotknowlionlookloomloonmeowmoodmoonmoormootneonnookoboeplodplotplowploypoofpoohpoolpoorprompropprowroofroomrookrootscowshodshopshotshowslopsmogsnobsoonsootspotstopthoutooktoottrodtrotuponwhoawhomwoodwoofwoolzoom
tree
baht
armybombcomecomacamedamedimedomefamefumegamehomelamelimelimbLimalimolamalimymamamemomimenamepumaRomesamesometimetame
Likely candidate word is: ache.
actsartsbathbothbytebitsbitebuttbetscotscutecatsdotsdateeatsfatefatsgatehatehatshathintojotsjetskitelatelotsletsmatsmathmitematemutenoteoathpotspetspathpitsputspatsraterotesitetoteuntovetowithzits
plan, scat, bear
Tree
Yoyo.