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.
wassail weasel weasely weaselly wisely woozily
assail reassail wassail sail tissual loessal tussal dossil sisal scissile resail missile missal messily loessial gassily dossal vassal fissile byssal bossily assoil mussily fussily sassily sessile fossil sal