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.
omer omber ombre
aimer boomer maimer bummer emmer gomer fumer vomer foamer roomer simmer rimmer seamer dammer rhymer dimmer rammer teemer namer chimer mimer shimmer lamer hammer hemmer rimer limmer gamer cummer gammer jammer hummer comer roamer seemer rummer homer summer reamer dimer omer tamer mummer timer mammer shammer gummer yammer