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.
strip stripe stripy stirp strap strep strop satrap satrapy stirrup strappy stroppy
atrip strip trip stirp strop stripy stripe strep strap rattrap satrap trop tripe trap tarp drip tiderip
stria striae astray sutra strow stair star stare starry stere stereo store satire storey story straw strawy stray strew stir stroy astir estray