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.
toffies toffees taffies toffs taffias tuffs toughies tiffs doffs tofus teffs tophes defies tafias dieoffs deifies duffs daffs dives doves tophs tufas diffs defis davies doofus tophus toughs devoice diffuse divvies typhose typhous
baffies jiffies biffies waffies toffies taffies coiffes gaffes roofies raffias bouffes feoffees fiefs fifes fives suffice piaffes coffees pouffes reifies ruffes defies taffias maffias deifies toffees office fes