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.
assoil assail asshole aisle asyla azole
soil assoil sol sassily sessile resile rissole assail lousily reassail nosily fossil soul wassail mussily missile busily easily queasily bossily cosily basil fusile dossil soli solo sill sole fissile gassily posole noisily mousily messily loessial silo fussily sail sola fusil resail resole rosily scissile deasil tahsil cheesily