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.
carver craver curvier carefree carrefour graver carfare griever groover groovier gravure gruffer gruffier
carver server arriver bereaver braver bravery brevier fervor forever rover griever groovier river deriver drover trouveur wherever curvier raver nervier moreover revere reiver reaver craver graver groover revery preaver prover riever privier surfer driver trouvere trover shriver
carve carafe corvee crave curve curvey curvy garvey scarf scarify scarph