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.
tunic tunica tunicae tonic tannic tung tanuki dung dunk tang tank ting tong
runic tunic ionic bionic vinic phonic hyphenic aeonic bunco sonic hypnic pianic hygienic scenic nick unco hyenic manioc genic conic snick quinic maniac manic muonic panic pionic cynic kaonic xenic tonic junco tannic tunica hyaenic yonic
tun tenia teniae tuna tune tunny stun