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.
curvier carver craver groovier graver griever groover carefree gruffier carfare gravure gruffer
curvier nervier wherever trover driver surfier prover groovier graver craver carver forever brevier braver arriver rover riviere riviera river rifer raver privier server deriver drover turfier shriver