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.
quietus quiets quits quoits quids guides quotes coitus quotas cuties cuddies gaudies cutties cuts qats kits guts gaieties gudes quods keets cutis gaits guids cutes qadis kites qaids quads kudus gutsy gouts cutesy ketose cuteys gateaus cutesie cooties catties kitties kiddoes kiddies goodies caddies
quietus adieus etuis fetus foetus hiatus coitus quiets meatus pietas retuse setous situs diets its