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.
variety varied verity variate ferity verite fruity fretty ferrety fart vert frit fret virid virtu fried fruit vertu fritt forty fared faired feared ferret forrit veered viroid virtue faraday ferried ferrite
variety ferity ferrety fretty fruity verity gritty parity pretty purity rarity surety treaty charity ret