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.
shuck shock chuck shack chucky shacko chock chick shook shake shaky sheik shako check chukka sheikh chickee chic chug shag shog
huck shuck chuck yuck huic lucky shock chucky chick muck chock check tuck duck suck pucka mucky quack luck ducky guck quick sucky ruck puck bucko hack fuck hick hock buck whack shack heck yucky
shaugh sheugh heuch hutch sauch such sheuch shush