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.
sleave slave slavey sleeve slieve salve solve sylva salvo silva selva sulfa saliva salvia silvae sleigh sulpha sylvae
leave cleave sleave deleave calve delve slave glaive slieve helve slavey salve relieve releve clave valve believe lieve levee leavy lave halve sleeve shelve
sale seal selah slaw slay slew sloe slue sola sole solei isle