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.
doomier dimer dammer dimmer dumber damar demur tamer timer dammar demure teemer timber daymare timbery
boomier doomier roomier homier omer foamier limier foamer omber limbier loamier rammier gambier bomber beamier gammier seamier lambier mimer womera chummier hammier boomer gummier gamier rummier somber homer gemmier jammier comer roamer gomer comber fumier rimier roomer vomer wombier woomera yummier mir