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.
groin grin grown grain groan groyne grainy garron gran green krone croon crown garni crone kroon grana krona crony gurney greeny corona granny carina krooni carrion greenie guarani guarana carinae coronae grannie carn corn curn karn kern kirn
groin heroin rin baron groan prion corona carina crony mirin grain roan hereon rein hyperon virion murrain ferine irony gyron ruin pereon barony crown murein grown narine taurine chorion durian whereon urine purin trone trine krone terrine saurian moron brain drone heroine serine dourine larine serein neuron pyrone marron marine iron herein jarina murine irone serin murrine sarin durion briny drain turion neurine train giron frown parian neurone brine krona farina morrion rain marina prone chorine morion brin heron grin garron croon crone carrion merino boron kroon maroon burin wherein bruin brown perron purine sciurine diuron drown terrain trona shrine