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.
ashing aching
aching joshing meshing pishing noshing niching fishing roaching pooching leaching leashing rushing hatching poaching quashing peaching couching bushing patching cashing hutching mushing hushing douching washing wishing whishing wooshing dashing touching dishing gushing baching bitching mashing reaching leching eching hashing pouching coaching botching leeching lashing fetching beaching hitching lushing letching ashing etching pitching coshing sashing moshing vouching fashing ruching matching gnashing itching batching mouching catching hotching mooching pashing notching retching bashing miching ouching peching latching caching gashing pushing ditching tushing deashing shushing whooshing witching watching teaching souchong chink shoeing chang shooing echoing reechoing reshoeing soochong