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.
gauchos cachous gouaches gashouse gushes gashes caches catches quiches quaichs gotchas cashoos cutches couches coaches cautious quaiches quitches cashes coshes kashas cashaws cashews cooches cuishes ketches quashes
gauchos couches chowchows douches ruches reechoes pouches ouches nachos muches mouches machos cachous chaos heuchs vouches echos echoes chows chose rechose rouches sauchs touches sheuchs