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.
gunnen guanine guanin guenon quinine quinone canine cannon conine gonion quinin coniine quinina
gunnen nannie chinone dynein pinene pennine lineny leonine nene neon nine none venene venine inane ionone canine cannon conine guanine quinine quinone linen mannan pennon rennin tannin hyenine
gunny gun gaun guan guanay guano guinea