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.
cruces cruses cruises carices coerces curacies carouses crases carses curses crazes corses crozes crises graces coriaceous grouses creeses cresses courses creases crazies crosses caresses cuirasses crasis krises crisis grazes gorses grasses greases grosses kerseys coryzas gracious griseous karosses
cruces truces forces varuses farces braces farcies piracies pursues peruses prices hyraces sources cereuses merces druses graces terraces cruses traces carices boraces ruses uruses murices varices process carouses coerces races recess reissues viruses rices rouses reuses precess pierces arouses rearouses ceruses orrices xeruses mercies terces grouses tierces curacies trices uraeuses choruses
croci crouse cruise crus cruse ecrus