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.
cheekier checker chokier choker chukker shakier chigger chequer checkrow chukar chakra shaker chicory chugger chukkar shicker shikker shocker shucker chickory shaggier chickaree shikar
geekier reekier cheekier kier pockier kookier peakier oakier quackier quakier leaker luckier gawkier muckier peckier pokier beakier wreaker seeker suckier dickier tackier weaker checker chokier yuckier rockier reeker pickier leakier rookier pecker lakier beaker jokier ickier hookier hokier pawkier cakier meeker cockier wrecker skier decker duckier wackier whackier necker kickier shakier yukkier kir