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.
skirr skier skerry suckier siker saker squire soaker sicker seeker scarry sacker sucker scurry saggier soggier scar scry
skirr kir keir ickier hookier hokier fakir beakier reekier kier leakier quakier pawkier peckier pockier geekier dickier tackier whackier chokier yuckier muckier cockier jokier rockier kickier kookier quackier lakier luckier oakier gawkier peakier pokier pickier skier cakier rookier suckier duckier wackier cheekier shakier yukkier