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.
quaich quiche quitch quash gouache cache catch coach couch cuish cutch cachou catchy gauche gaucho
laich quaich ich bach aitch achy gouache coach itch beach mache loach lich leach cache match nacho catch niche patch peachy poach ratch rich sauch dacha tach teach which witch batch beachy each latch watch seiche ditch reach roach pitch poachy pacha peach miche natch vichy tache macho wich mach fitch lichi fichu leachy quiche fiche bitch quitch ache hitch hatch chichi
quai qua quay aqua aquae guaiac quack quacky quag quagga quaggy quake quaky quick quickie squaw