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.
suntan sundown syntony sonatina sonatine sanidine
quintan suntan wanton maintain randan ponton pintano pentane muntin mountain fountain montane lenten lantana quintin quintain contain canton dentin wonton
santo saunaed sent sente senti snit snot snotty sound suint sundae sundew sunned