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.
crams creams crambes crambos grams corms cramboes cramoisy cremes crimes crumbs gramas caroms cramoisie cormous carroms corymbs grammes curiums grammas crummies gouramis gorms gouramies corymbous corymbose kormas grumes kermis karmas kermes grooms grimes grumose grumous kermess kirmess quorums gremmies kermesse
rams drams dirams jorams grams ihrams zirams forams prams crams trams marrams norms terms prims forums bermes rearms dreams dioramas caroms barms kermes quorums gorms forms praams kermis breams larums chirms worms firms trims harms durums arames ramus dermas fermis dermis gouramis gramas proms arms vermes creams serums rems karmas frames formes reams rims arums jorums vermis rums aurums derms dramas germs berms herms corms perms roms kormas ferrums paramos harems carroms dorms farms taramas brims drums roams warms charms choriambs
cram crambo crambe gramme caramba corm cream creamy creme crime crumb crummie crummy gram grama gramma crumby scram