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.
beach beachy bach batch beech beechy bash beauish boche bitch botch butch bashaw bitchy botchy bouchee bosh bush
each teach beach reach leach peach leech cache ratch patch pech beachy mache ache laich peachy echo lech ketch fetch achy match natch reecho retch wretch dacha tach beechy poach leash loach yech bach letch quaich nacho mach pacha batch poachy etch hatch vetch coach techy eche macho beech gouache watch catch latch leachy heuch reechy roach sauch deash tache tech teuch sheuch yechy