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.
defis defies deifies defuse devise devious difs devisee dieoffs devs dufus doffs doves teffs daffs dives devas divas diffs duffs defuze tafias doofus device deface deaves davies devoice divvies taffias taffies toffies
defis efs effs biffies beefs neifs reefs reifies roofies fiefs jefes seifs deifies taffies teffs waffies chiefs defies reifs jiffies raffias keefs kiefs kufis leafs levis maffias mafias kefs refs baffies taffias tafias toffies chefs sheafs