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.
scutch scotch scootch seecatch scooch sketch seecatchie sketchy squish scotia squush squash sickish squashy squishy squoosh squooshy
scutch cutch sketchy sketch seecatch scotch scootch bycatch ketch quitch gotcha gaucho gauche couch catchy catch yucch