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.
strappy satrapy stroppy strap satrap stripy stirp strep strip strop stripe stirrup
strappy drapey drippy trippy satrapy stroppy
straw strawy stray stria striae sutra astray estray