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