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.
boffs boffos bouffes baffs biffs buffs buffos baffies biffies beefs baghouse bughouse
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
boff boffo baff baffy biff biffy bouffe buff buffi buffo buffy