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.
acuter actor actuary
couter cuter scouter acuter skittery cooter secateur guttery coater cattier racketier pocketer negater fagoter cutter squattier ricketier cautery cotter quitter cattery rocketer scatter scooter cater skeeter locater gater scutter scattier skater scoter picketer cottier ciguatera rocketeer requiter gutter squatter guttier skitter racketeer goutier goiter boycotter kiter gaiter quoter quieter dictier