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