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