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.
buffeter beefeater
buffeter hefter shifter wafter tufter defeater softer riveter rafter ofter loftier lofter lifter lefter coveter heftier hafter feater beefeater after vetter vetoer fetter fetor niftier poofter refuter sifter dafter defter tuftier wiftier shiftier
buffed buffet baffed biffed boffed