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.
strop stroppy stirp strap strep strip satrap stripe stripy satrapy stirrup strappy
trop strop droop strip drop tarp towrope trap trip atrip troop trope footrope rattrap satrap stirp strap strep dewdrop
strow stroy astray star strawy straw stoury stourie stoure stour satori story strew store stereo stere starry stare stray stria storey stir striae sutra estray