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.
macron macaroni macaroon micron megaron mikron migraine
bicron dacron macron micron ligroin regrown recrown scorn croon acorn bicorn crony decrown bigaroon megaron macaroni crone crown mikron macaroon picaroon corn krone corona carrion negroni begroan geocorona pickaroon krona kroon grown groin groan curn garron carn decurion
macro micra micro mucro smacker