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.
boffos boffs buffos bouffes baffs biffs buffs baffies biffies beefs baghouse bughouse
buffos boffos feoffs howffs huffs jiffs caffs coiffes effs gaffes guffs quiffs muffs luffs pouffes puffs riffs ruffs daffs diffs duffs tiffs tuffs whiffs chuffs offs bouffes buffs miffs biffs baffs foys foss foes coffs boffs cuffs gaffs quaffs luffas naffs piaffes pouffs raffs ruffes rufous dieoffs doffs teffs toffs waffs chaffs yaffs
boff boffo baff baffy biff biffy bouffe buff buffi buffo buffy