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.
vassal vasal vessel visual phaseal visually fossil fissile fussily
vassal byssal dossal loessal missal tussal sal missel resail rassle hassle pussly causal masala hassel loessial reassail pausal seal assail nasal reseal saul usual phaseal tussle vessel bassly sisal sale mussel tissual basal vasal casual sail tassel resale wrassle fossil passel sall visual dossel dossil wassail
vas vasa vase vaus vaws vavs kvas kvass