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