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.
bets beets beats betas bettas beauts betise buts bits beds bots bats boots bides butes bouts butts beauties bitsy beads bites boats batts bodes bahts baits bytes bitts botas botts bates beauteous bodies buteos boites bedews buttes biotas baddies bawdies battues biddies buddies bootees booties bawties beedies boodies butties bads bids bods buds bauds bawds bidis
beets keets whets weets duets deets sets poets pets nets meets lets leets quiets jets bets gets hets haets vets fets rets suets diets tets wets sheets