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.
suckier sucker skier sicker sacker saker sucre siker skirr seeker squire skerry soucar soaker soggier scoriae saggier scry scar cigar scree scare sugar screw sacra scary score scaur scour sowcar seggar secure scurry square screwy scoria scarry scarey sagger sugary cicoree saguaro
ickier peckier rockier suckier luckier tackier quackier muckier yuckier cockier duckier kickier wackier pickier pockier whackier dickier kier backer beakier gawkier tacker knackery hacker sacker whacker peakier mocker wrecker cocker fucker racker dacker skier licker quicker pucker dicker shocker shakier cheekier wicker reekier mucker bicker hookier bucker docker knacker mockery ducker lakier icker lacker hokier tucker pokier quakier knocker pecker rookier packer leakier jokier rockery decker kicker necker locker picker quackery puckery wacker oakier nicker ocker rocker ticker pickeer jacker kookier cakier pawkier geekier sucker sicker hocker whicker checker chokier shicker shucker yukkier kir