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.
sassily saucily sessile scissile sisal cicely sizzle
fussily sassily messily gassily bossily mussily wassail missile fissile lousily easily reassail queasily pussley fossil noisily sessile bassly loessial cosily dossil busily mousily silly rosily scissile pussly assoil nosily assail cheesily sly
sassies sass sassy assais assize cassias cassis lassies lassis sasses sissies dassies tassies