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.
siamese shames shammes shams shims shammies shimmies chimes shamos shmoes shamus shamas shawms shamois chamise shammas shamoys shammos chammies chams chymes chamisa chamiso chamois chemise shmooze
siamese amuse shammes chamise tumesce dames ramies names fames vamose hames heaumes jambes amies cames camise gambes games kames lames mameys mamies ramees ramose tames wames shames cameos