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.
refuter rafter riveter righter
refuter loftier shifter wafter tufter defter softer sifter rafter poofter ofter niftier lofter after lifter lefter heftier hefter hafter buffeter dafter devouter tuftier wiftier shiftier