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.
gateaus gates gats goatees gaits goats katas cates gaieties gauds catties coatees gaudies guts qats gads kats cats coats gadis guids kytes goads kites cades cutes cotes gudes gutsy gouts coatis cuties gaddis cuteys cutesy coitus guides quotes caddies cooties cutesie cutties goddess goodies kitties quietus
chateaus gateaus taus teas tease toeas beauteous beauts luteous meatus piteous duteous tauts teats tas