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.
monist mooniest hymnist moonset monazite meanest monacid mainstay minacity monoacid monocyte moonseed mensed
hygienist monist hymnist pianist tanist tennist meanest liniest teeniest weeniest dunnest looniest onset toniest downiest gainst sunset tiniest waniest funnest whiniest canoeist finest inset viniest sunniest soonest tawniest zaniest tinniest unset wannest wenniest whinniest sheeniest vainest winiest renest mooniest funniest rainiest moonset keenest canst canniest runniest piniest gooniest fawniest ginniest sanest luniest punniest finniest funest leanest fenniest fainest boniest honest tannest dynast veiniest nest bonniest phoniest puniest neist shiniest
monies manias menisci minis moans monas moneys monoecy monos mons moons munis muons amnios