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.
leafed leaved loafed laved leveed levied luffed laughed left lefty lived loved
loafed leafed sheafed chafed fed reefed whoofed eaved raved pouffed refeed deaved roofed reified woofed saved tiffed piaffed offed knifed gaffed heaved sheaved shaved cheffed chaffed feoffed fifed hoofed buffed huffed coiffed caved miffed feed weaved waifed riffed quaffed reaved laved leaved feod biffed baffed paved naffed muffed luffed boffed poufed puffed deified refed goofed cuffed beefed ruffed daffed defied doffed waffed waved whiffed wifed coifed feud chefed chuffed reffed yaffed
leaf leafy leave leavy leva lief loaf alef blaff cleave clef sleave