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.
brainier brinier brannier brawnier briner barnier branner brownier burner browner barrener
rainier brinier brainier grainier runnier drainer barnier pornier brannier loriner brawnier greenier ruiner grainer fernier cornier briner furriner grinner brownier mariner vernier dernier hornier trainer
brain brainy bran brin bairn borane branny brawn brawny brine briny briony bruin buran burin