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.
sheeniest shiniest
teeniest weeniest sheeniest hygienist fenniest fawniest liniest mooniest rainiest waniest canniest zaniest runniest tawniest tinniest tennist wenniest whinniest piniest funniest phoniest renest boniest gooniest punniest puniest sunniest keenest leanest looniest meanest viniest ginniest winiest downiest finniest veiniest toniest tiniest bonniest luniest whiniest shiniest nest