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.
cults culets cultus cullets clots colts culottes cleats guilts quilts gaults cloots caulds clouts gullets colitis callets collets quillets calottes collates gluts kilts clads colds kelts clods qualities glutes clades gloats guilds clouds gleets glouts gluteus galiots kilties gallets coleads galoots glottis galateas collides colludes galloots galettes galliots colloids galletas gallates claddaghs quaaludes
faults poults vaults saults gaults cults moults gilts blets ballutes fallouts blots bluets flouts ballets callets mallets glutes molts quillets jolts mullets palets bullets lots pullets moulds lits pilots fluyts plats flits guilts lutes hilts faulds pollutes sallets shallots wilts welts toilets tallits dilutes deltas solutes slots slats sellouts salutes rialtos howlets rollouts bailouts reallots blats lats kelts flutes louts halts pellets milts valets violets clouts jilts lilts culets kilts altos billets pelts filets pallets malts volts quilts cultus helots clots voltes valutas belts cullets colts millets flats gluts gelts glouts maillots flautas lets gullets alts melts plots fillets rillets bolts veloutes gallets felts owlets collets caulds piolets elutes ballots pullouts volutes allots celts relets salts holts silts slits sluts zealots delts dolts tilts wallets willets chalets sheltas
cult culti cauld clot clotty colt could culet culled cullet cullied culotte aculeate sculled