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.
wiftier wafter weightier weighter wafture
loftier niftier wiftier shiftier heftier tuftier naughtier shifter hafter weightier softer hefter refuter poofter fattier footier after lifter rafter buffeter sifter maftir dafter mightier tufter ofter defter wafter lefter lofter