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.
tarpan tarpon trapan trepan trappean tropin terpene tropine terrapin truepenny
tarpan arpen firepan frypan hairpin harpin orpin priapean propane tarpon trapan trappean trepan sharpen
tarp trap trip tripe trippy trop trope