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