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.
gums gaums gumbos gummas gams gummous gummose gambs kumys gamas games kumiss gammas koumis koumys gamays gambas gambes gombos gambias koumiss cumbias koumyss goombays cams goombahs cwms camas cames camos comas combs comes kames
bums hums geums gaums gums lums mums neums rums sums doums chums