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.
filmis films flams flames fleams flimsy flumes flambes foliums fullams flambeaus phloems vellums volumes phellems
filmis salmis helms glums halmas films elms flams bulimias blams balms elemis salamis glims haulms qualms culms palms clams realms holms slams slums xylems whelms shaloms kelims kalams phellems malms golems halms lams lums fullams almas almes kalmias ylems vellums kilims gloms lamias glams plums coeloms celoms calms alms alums slims solums dolmas chillums sholoms
film filmi filmy filum flam flambe flambeau flambee flame flamy flume