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.
fancy fiance faience fans fiancee fanos fanes fauns fawns fence faenas faunas fannies fens fins fons funs vans
fancy nancy chancy dance lance chance tansy bouncy fiance hance jouncy lunacy zincy wincey nance nuance pansy rance seance mincy
fan faena fain fane fanny fano faun fauna faunae fawn fawny