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.
sneaky sneak snaky snakey snake snack sneck snaggy senega seneca sunk sank snag sink sanga snick snook snuck zinky zincky
sneaky hanky lanky snakey snaky sneak
sane sene sine sinew sinewy snaw sone syne esne season usnea