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.
focally vocally focal fugally fecal vocal faecal faucal feckly fickly foggily vagally fugal facula fecula fickle faculae feculae fuggily vaguely
focally caecally ducally vocally laically locally cecally call legally fugally coaly scaly vagally colly regally gally galley calla coequally recall scall equally squally cully teocalli