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.
tofus toffs toughs tophus doofus typhous toffies toffees taphouse toughies tophs tiffs tuffs teffs doffs dufus tufas tophes typhus defuse tafias devious diffuse taffias taffies typhose dieoffs doghouse difs tavs
doofus tofus baghouse roughhouse refuse oafs poofs fuss loofs feoffs sofas boffs effuse howfs doffs taphouse dieoffs fuse feus uveous woofs bughouse loofas rufous suffuse defuse hoofs roofs poufs niveous offs loafs toffs goofs coofs coifs coffs doghouse diffuse dufus devious typhous whoofs chophouse
tofu toff toffee toffy tough toughie toughy etouffee