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.
sneaker sneakier snacker snakier sinker snicker snooker snickery snaggier sangar snigger snugger sangaree sinecure snuggery snuggerie sangria zingara zingari zingaro
sneaker knacker necker banker hanker gennaker canker lanker ranker snacker snakier sneakier danker tanker wanker
sneak sneaky snack snake snakey snaky sneck