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.
shams shawms shames shamus shamos shamas shammes shammas shammos shamoys shamois shims chams shammies shmoes chamisa chamise chamiso chamois siamese chammies shimmies chums shmooze
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
sham shame shammy shamoy cham chammy shawm shim shimmy shmo schmo schmoe