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.
guinea quinoa guanay gun gane gone kuna kune gaun quin gain guan kine kina guano koine gunny quean gonia quoin goanna gooney goonie gan kin
guinea tinea hygiene bine inia heinie vine vina meinie fine minae zine pina piney cine sine kine whine wine chaine chine nine mine sinew kina dine diene tine koine quinoa liana seine line liney liane mina hyponea pine pinna tonneau whiney winey china shine