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.
samosa sambos sumos seams sambas simious sums soms sims semes semis seems somas smews simas cymose cymous summas zamias
mimosa samosa mos shamois umbos chamois daimios dumbos famous awmous gummose mimeos homos cameos camos comose chymous shamoys gombos limbos hommos bimbos memos moms omasa ramose rimose romeos cymous mambos vamose comous camisa gumbos jumbos masa sambos combos ambos mows moss moos moas limos mesa ammos haymows gummous nomos pomos ramous rimous cymose sumos demos duomos chamisa chemos shammos shamos shmoes
samba sambo same seam seamy sumo