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.
incite inosite ionicity inside ionised ionized inset
phenacite incite zincite reincite conceit tonicity gonocyte coincide monocyte monazite minacity kunzite conicity genocide ionicity inosite fancied tenacity coenocyte choanocyte