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.
brain brainy brin bran buran briny brawn bairn burin bruin brine borane briony brawny branny bren barn biriani burn born boron baron brown borne bourn barny browny burnie bourne barony barney boreen barren byrnie baronne brownie
rain train brain drain murrain grain terrain rin ran cairn burin borane marine murein marrano taurine grana carrion groan roan rani arraign heroin furan bran grin brine purine guarana narine sciurine furane shoran chorion wherein turion morion sarin terrane rein serrano bairn deraign prion serin herein jarina durian rainy brin farina parian carina airn murrine pyran briny brawn marina brainy murine guarani morrion crane merino gran purana prawn dourine pirana ferine reran groin grainy bruin saran buran serein mirin ruin loran curran sierran moraine terrine neurine virion serine saurian purin drawn durion larine trine urine chorine shairn shrine
bra bora brae braw bray brie brio bura abri babier