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.
cowman cowmen caiman cayman common combine commune cumin camion cummin gombeen kamaaina
bowman cowman showman lawman man bayman caiman cowmen bemean mean lawmen human leman immane bowmen remain roman seaman soman demean toman shaman showmen cayman reman many maun mano mane mana main mawn humane bemoan liman amain moan layman romano simian daman domain woman foeman yeoman
cwm coma comae comb combe combo come comma commie commy coomb coombe