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.
chams chamois chamisa chamise chamiso shams chums chammies shames shamus shamos shamas chimbs chimes chemos shawms chymes chemise shamoys shamois shammos shammes shammas chymous shammies shims shmoes siamese shimmies
hams whams chams shams shamus shamas whims hims dames llamas names maims pams lamas ramus lames roams gamas shims shamos hems tames camas tams camos wames iambs haems fames gaums lams jambs lambs foams amis aims hums reams amas jams bams beams amus loams ohms mamas rams games gams shawms seams hames dams gambs tamis cames teams cams wamus chums shames kames yams
cham chammy chemo chimb chime chum chummy chyme sham shame shammy shamoy schmo schmoe