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.
sulphone sulfone cellphone xylophone sloven cellophane sylvine silvan sylvan sylvin
allophone mellophone polyphone cellphone sulphone xylophone telephone allophane elaphine colophon colophony polyphony cellophane telephony