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.
flimsy foliums films flams filmis flames fleams flumes flambes fullams flambeaus phloems vellums volumes phellems
flimsy slimsy heliums kilims kaliums limbs limes limos alliums films foliums limas millimes claims climes clumsy galliums glimes glims kelims malmsey palliums slims climbs slimes delimes
film filmi filmy flam flambe flambeau flambee flame flamy flume folium