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.
wifes wifeys waifs wives waives wavies whiffs waffies waffs waves woofs waveys weaves weighs whoofs wheyface
fifes wifes knifes fes ifs whiffs vies fehs seifs fiefs foes hives kiefs fives gaffes davies baffies miffs fess ruffes quiffs cafes jefes roughies safes lives bevies levies deifies shavies chivies naifs chiefs chafes divvies wifeys piaffes toffies ivies waffies rives tiffs biffies difs waives civies feus jiffs neifs biffs coifs kifs coiffes pouffes bouffes coffees knives reifies civvies sophies reviews reifs heavies savvies cavies roofies movies feoffees jiffies gives defies fees riffs navies taffies views rifs navvies peavies cuifs jives wavies kaifs mavies toffees dives naives toughies waifs diffs reives wives chevies chives chivvies shives