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.
hummus humus hums hommos heaumes hams hems hims haems hames hemes homes homos homeys homies haymows
hummus wammus mus summas gummous amus ammos muss muse iambus awmous mammas commas amuse mommas momus mums muumuus ramous rimous wamus shammas shammos emus lemmas gammas famous bemuse emeus comous limbus femmes hommos humus gimmes emmys shammes chymous gummas mems moms mumms mumus nimbus ramus cymous kombus shamus