While "dyin'" and "lion" do not form a perfect rhyme, they can be considered a near rhyme or slant rhyme. In this case, the two words share a similar ending sound, but they are not identical. When reading the poem aloud, you can emphasize the "i" sound in "dyin'" and slightly soften the "o" sound in "lion" to make the rhyme seem more natural. This type of rhyme is often used in poetry to create an interesting or unexpected sound pattern.