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.
morales morals moralise moralize morelles merles morels murals morulas marls merls morellos
rales chorales morales brails ooralis reales barless corals orals frails craals barleys oarless ferrules parles birles braless gearless serails ferals heirless hurleys carles chorals trawls aerials cheerless drails charleys whirlies gorals urials merles airless tearless paroles farles derails grails burials pyrroles morals curlews peerless reals rails orles rials rules hairless carless girlies goorals hurlies serials hourlies brawls furless crawls ferules ferlies roles riles charlies gharials cereals doorless parrals fearless arles proles kraals earless graals corrals murals parleys drawls trails trials burleys warless wooralis borals yearlies
moral morale morally morel morelle morello morula morulae mural amoral amorally