I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
berets berettas burets berrettas berates barrets bruts borts brits brats burettes birettas bredes birrettas breeds britts bruits barrettes breads boarts beards barytas brights burritos bards birds bortz brads burds boards broods brides bardes brutes braids broads barites barytes birdies borates borides burdies byroads hybrids
barrets trets rets carets frets garrets curets terrets berets burets ferrets turrets arts frats greats greets tarts courts karts brats curtsy borts artsy airts carrots treats hurts morts boarts drats parietes vertus gourdes aortas rats shreds shirts charts worrits warts tortes territs parrots derats sorts prats grots merdes trots crits farts cartes bruts keiretsu reds pierrots grits kurtas merits marts fortis parts cruets hordes korats brits hearts quartes ports virtus girts harts forts rots ruts bardes quartos fortes verts darts quirts aretes orts frits nerts jurats creds karats dirts carats carts tortas tarots torts writs certes quarts whorts worts cherts shorts yurts
beret beretta burette buret breed brede bred bready bored bread biretta berried berretta berate beard bared beebread