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.
tenace tense tenues tenias taenias tennies tens dance teens tunas dunce denes dense tineas denies tennis teensy dienes tenuis dueness duennas tenuous townees deionize tonneaus
menace tenace pinnace jounce fence faience bounce once hence launce pounce mince hance rennase seance dance bonaci ansae nice wince chance nonce nuance fiance kinase quince jaunce fiancee pence lance lunacy mensae nance wincey whence guanase ounce panacea ponce rance science since dunce yince
ten taenia taeniae teen teeny tenia teniae tuna etna steno tetany