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