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.
doffs dieoffs daffs toffs diffs duffs doofus diffuse toffies difs toffees tofus defis teffs tiffs doves dufus tuffs defies defuse deifies devious taffias taffies doghouse devs doughface
feoffs doffs boffs dieoffs coffs offs toffs pouffes muffs waffs baffs quiffs oafs biffs raffs piaffes coofs luffs tofus goofs whoofs bouffes boffos buffos gaffes quaffs loafs daffs poufs loofs effs coiffes ruffs chuffs naffs chaffs ruffes miffs caffs loofas tuffs tiffs coifs luffas hoofs buffs riffs sofas roofs teffs whiffs woofs puffs guffs huffs gaffs howfs cuffs howffs poofs doofus duffs jiffs pouffs diffs yaffs
doff daff daffy diff duff toff toffee toffy