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.
tups taupes tops taps dups tips toupees tipsy tapes tapas typos dupes topes tapis topis topos typps tipis types tepas topees tepees tepoys teepees teapoys tawpies daps dips deeps dipso dopas dopes topaz
jaups coups cups loups pups roups soups sups dups tups ups whaups whups yaups yups