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.
gaffed quaffed cuffed goofed coiffed caved coifed coughed gavotte
biffed chuffed naffed baffed coiffed muffed luffed offed puffed chaffed doffed huffed tiffed boffed piaffed yaffed ruffed reffed quaffed waffed whiffed daffed riffed pouffed cuffed cheffed buffed miffed feoffed gaffed fed refeed fifed loafed refed reified beefed knifed buffet defied tuffet woofed sheafed goofed leafed coifed feud whoofed poufed feod feed reefed hoofed chafed chefed haffet deified whiffet wifed waifed roofed