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.
coriaceous carices coerces griseous curacies gracious corses graces crazes crises cruces crases creases cruises crazies courses coryzas gracioso carouses cuirasses crozes gorses curses crasis grazes carses cruses crisis krises creeses cresses crosses grasses greases grouses caresses
araceous coriaceous ceraceous veracious voracious gracious sericeous