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.
hillocks holks hulks halakahs hallux
blocks flocks bollocks bullocks locks clocks mullocks shylocks hillocks rowlocks pollocks killocks shlocks relocks locus flocs blacks lucks cowlicks slicks plucks rollicks clicks flacks relooks blokes blocs lacks looks cloaks shellacks placks flicks locos slacks flecks killicks licks clacks pollacks klicks clucks