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.
wekas weeks wags woks wacks wakes wauks wicks wackes wackos whacks wax whackos waxy wigs wogs
wekas kas sukkahs queasy keas pekes wreaks recks seeks peags pecks okas skas beaks koas necks leeks degas kecks takas quokkas tikkas kaes ukase kays kaas ekes cheeks sheiks zeks sikas hecks geeks jackass becks fecks hookahs peeks reeks pikas wrecks okays peaks neuks weeks skuas leks zaikais leaks decks kakas dekes keeks teaks gecks tokays hookas checks chukkas yeuks