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.
cravat craft corvet crafty craved curvet gravity gravida gravidae corvette kraft graft croft graved carved curved gravid grivet corvid greaved crowfeet crowfoot graffiti graffito graphite
cravat nervate private pyruvate derivate
crave carafe carve corvee curagh curve curvey curvy grave gravy scraigh