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.
phaseal vasal vassal fusel vessel visual
phaseal seal weasel tassel pausal passel nasal masala causal casual hassel vassal vasal easel basely basal reseal teasel weasely sal sel