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.
filariid flared florid fluorid foulard fluoride flurried fleered floored floured fluorite fullered flirt flirty floret
filar filaree filaria filariae filer flair flare