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.
koumis koumiss kumiss koumys koumyss kumys kombus commies cumbias gums comes combs gaums comas kames comose gombos combos camise gummas commas gumbos coombs combes camisa comous caeomas cammies coombes gambias gummose gummous goombahs goombays
koumis mis jammies gaums rums koumiss lumas kumiss lamias amias sumos miss jimmies camise doums mamies amies commies gums amis geums daimios zamias whammies shimmies shammies tamis chemise chammies mumus chamise tommies mommies pumas roomies mumms dumbs pneumas neums demise remise miso mise cammies heaumes camisa jemmies gimmies bums mammies dumas immies humus sums hyphemias fumes loumas kumys lums koumys semis amiss hums homies demies zombis mummies remiss doumas numbs pommies dummies mums rummies ramies tummies chamisa chamiso neumes chamois chums tammies shamois yummies