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