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.
grumous grumose grumes cormous grams gorms corymbous crumbs grooms grimes gramas grammes quorums curiums crambos grammas cramboes gouramis cramoisy gremmies crummies cramoisie crams corymbose gouramies corms kermis kormas kermes cremes karmas caroms creams crimes carroms corymbs crambes grimace kermess kirmess
brumous grumous ramous rimous biramous cormous corymbous grumose rearmouse reremouse dormouse chromous shrewmouse