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.
primus prims primas primos primes primsie proms prams perms promos proems praams premise paramos primacy premiss premies promise permease preemies promisee hyperemias
primus ramous chirms trims ceriums prims primes grumous rimes rimous rims bariums berimes biramous bohriums brims brumous firms cormous crimes curiums grimes primas primos ramus surimis yttriums chromous
prim prima prime primi primo perm pram premie prom promo