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.
summits summates smites samites somites smuts symbiots symbiotes
commits summits fomites omits mammets mitis mitts ambits boehmites emits emmets mites remits vomitos vomitus gambits gummites limites limits mammitis reemits samites somites vomits smites demits