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.
chums chams chemos chimbs chimes chymes chemise chymous chamiso chamois chamisa chamise chammies shims shams shamas shames shamos shamus shawms shmoes shammas shammes shammos shamois shamoys shammies shimmies
hums chums doums loumas pumas pneumas neums mumms gaums kumys chams doumas koumys koumis gums whams dumas shams mumus lumas sumos bums fumes rums ohms numbs mums lums neumes hams sums heaumes hems hims whims dumbs humus geums shims
chummy chum cham chammy chemo chimb chime chyme schmo schmoe