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.
caeomas camas comas camass cameos commas cams gamas combs cames camos comes comous gambas gamays combos camisa combes gammas comose coombs cammies coombes gambias cumbias commies cwms gams goombahs goombays games gambs kames gaums camise gambes gombos gummas kombus koumis koumys koumiss koumyss
caeomas lemmas somas biomass hyphemias comas bemas commas loumas mommas nemas nomas pneumas omasa doumas mas ems oms