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.
scored scoured sacred scared screed scried secured scarred scrod suckered scurried secret squared squired skirred secrete sugared saggared saggered scart skort scrota cigaret saggard skirret security skywrite skywrote
cored scored liquored gored checkered sugared degreed skirred daggered screed squired credo scurried pickeered cord cared queried figured knackered decreed shickered augured jiggered cred leaguered cockered quarried acred nickered puckered record required saggared scared bickered tuckered caried agreed decried squared dickered scried daikered sacred suckered scarred secured queered scoured saggered carried quired recarried chequered dackered whickered buggered gourd nacred creed beggared recurred garred greed curried curred cured cried lackered shikarred
score scoriae scoria scree sucre scurry scry screwy screw scary scour scarry scarey scare scar sacra escrow