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.
scanty scant secant squinty scanned scandia skint signet secund second squint cygnet seconde secondi secondo sequent siganid sickened
canty scanty dignity squinty candy scant cant canto county gaunt qanat quanta quaint quant equinity vacant cocoanut picante piquant recant secant decant taggant