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.
corps corpse corpus crops gorps craps carps crapes carpus creeps cripes crepes croups croupes croupous crappies croppies creepies grips grapes gripes gropes groups kreeps grappas grippes carapace groupies
corps dorps gorps crops perps raps groups liriopes ropes roups sirups pyropes preps croups craps wraps corpus droops dropsy hydropsy towropes trips tropes urps chirps sharps grips burps reps fraps warps traps troops hydrops tarps drips drops harps larrups rips turps syrups chirrups rewraps props preops gropes hyperopes bewraps corpse carpus carps herpes sherpas
carp carpi crap crape crappie crappy crepe crepey crepy cripe crop croppie gorp