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.
lashins lesions lushness lichens lochans lotions
shins lashins zechins reshines machines chains katchinas chinas chines chinos chins shines shuns echinus basions fashions fusions visions cochins cushions kachinas lesions nasions suasions shoeshines