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.
grimes grumes crimes grammes grimace grams gorms gremmies gouramies kermes gramas grooms cremes grumose kermess grammas curiums crambes grumous kirmess gouramis kermesse crummies cramboes crams corms karmas kormas caroms creams kermis crumbs carroms cormous corymbs crambos quorums cramoisy
berimes rimes crimes grimes primes rhymes kermes armies arames brumbies brims premies berhymes gouramies rims bromes crummies crambes rummies firms curiums prims ceriums trims chirms ramees brumes ramies preemies kirmess kermess grumes grammes bohriums gremmies bermes biremes romeos frames roomies bariums cremes vermes formes primas primos primus surimis yttriums chromes
grim grime grimy crime gorm gram grama gramma gramme gremmie gremmy grum grume