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.
scaly scall scale sickly squally cecally socle skoal scull scowl cecal cicala cicale sickle squall squeal suckle zocalo seagull soggily
scaly gaily equally laical locale legally knuckly caecal coequally jacal recoal pical cecal vagally cicala vocally fickly scale focally calo faucal squally faecal decal fecal ducally agly weakly gayly gally coly hackly coaly cloy laically locally local packly caecally quickly jackal regally recall cecally vocal call cicale focal scall fugally sickly caul zocalo clay ducal feckly tical coal chicly