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.
sylva sylvae silva selva silvae saliva salvia salvo salve solve sulfa sylph slave sleave sleeve slieve sulpha sylphy self
sylva lava leva volva vulva vulvae halva halvah helluva saliva salvia selva silva silvae sylvae ulva