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.
howffs howfs hoofs huffs haafs hooves
howffs buffs biffs boffos cuffs bouffes buffos boffs raffs daffs ruffes diffs pouffs piaffes duffs naffs tiffs miffs tuffs luffas whiffs gaffs chuffs quaffs baffs feoffs pouffes coffs caffs coiffes huffs howfs jiffs puffs ruffs riffs dieoffs offs effs doffs muffs teffs luffs toffs quiffs waffs gaffes chaffs guffs yaffs