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.
shawms shams shamus shamos shames shamas shamoys shamois shammos shammas shammes shims chams shammies shmoes chamisa chamise chamiso chamois siamese chammies shimmies chums shmooze
shawms fames hams llamas names maims rams lamas lames gaums seams reams dams gamas tamis games cames teams cams wamus jambs chams iambs shames jams shams hames miaows haems foams beams gams bams amis loams pams mamas ramus lambs lams kames dames roams tames gambs maws tams camos wames cwms whams aims shamas amas shamos camas shamus amus yams
shawm sham shame shammy shamoy