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.
diffuse diffs defuse difs dieoffs duffs tiffs daffs doffs dufus defuze doofus devise deifies diphase devious devisee doghouse defis tofus toffs tuffs dives divas teffs device deface defies davies devoice divvies taffias taffies toffees toffies
effuse suffuse diffuse fuse fusee coiffeuse refuse defuse