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.
syne syn sane sine sene sone sinew scene seine sawney sinewy son sin sun sen sign cine sain sunn snow seen sinh sown sewn soon zone zine snaw sawn hyson sauna scion senna snowy sonny sunna sunny zonae scena