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.
tripod tripody tripped trepid torpid trooped trippet trapped dripped torpedo trouped dript trapt draped drooped dropout dropped
tripod riped griped groupoid myriapod myriopod pereiopod pereopod cirriped sauropod tripody uropod chiropody
trip tripe trippy drip drippy tarp trap trop trope atrip strip stripe stripy