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.
curassows carassows cuirasses curses crases crasis cresses grasses courses creases crosses curacies caresses corses crises crisis cruses carses crazes coryzas crazies creeses cruises greases grosses carouses gracioso grazioso karosses
curassow crass carassow cuirass curs