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.
saker sacker soaker siker skier sagger sucker skerry sicker seeker suckier scar saggier sugar scary skirr scare scaur sacra scarey scarry seggar soucar sowcar square secure saggar sugary saguaro scoriae soggier scry
beaker faker taker waker leaker quaker baker shaker wreaker weaker laker maker raker saker soaker cookery wackier packer jokier meeker peakier quakier knackery quicker sacker fakeer cakier hooker bucker rookery cooker pecker icker pickier hiker hawker daiker oakier locker suckier mocker joker quackery keir tackier rocker ducker yuckier shucker shikker shakier chukker choker checker wicker whackier biker tucker ticker duiker diker ickier necker dicker licker nicker reekier siker makar pickeer kickier geekier lacker seeker piker muckier fucker knacker kier racker pokier skier hookier cockier pawkier hocker dickier poker peckier fakery kookier reeker hacker mucker luckier mockery beakier rookier kicker leakier ocker bakery quackier bicker cocker knocker booker pockier hokier puckery rockery decker picker fakir sucker liker rockier gawker sicker looker lakier dacker gawkier quaere docker backer tacker duckier wrecker jacker toker wacker whacker whicker chakra cheekier chokier pucker shicker shocker yakker yukkier
sake sack saki sike skee skew skiey soak soke syke askew