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.
sumacs smacks smocks sambucas smogs sameks smeeks smokes samekhs sambukes
macs sumacs chemics umiacks tombacs tombacks tambacs smacks oomiacs oomiacks mimics comics mycs mocs mics mags macks umiacs chymics