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.
cumbias gambias camas comas combs koumis camisa gambas coombs gumbos gummas kumiss commas camise camass combos combes coombes koumiss commies cammies caeomas gums cwms cams goombays goombahs gamas cames kumys gambs comes gaums camos gombos koumys gammas comose comous gambes kombus cameos gamays gummose gummous koumyss
gambias cumbias zombies sambas amias bimas embays hyphemias gambas goombahs goombays lambies lamias limbas mambas rumbas zamias zombis mas mis