He is a fast/slow 'walker'. [=he walks at a fast/slow pace]
She joined a group of 'walkers' in the neighborhood.
(..) enough to send us a bit of fire. Come to us in our darkness. For the night is dark and full of terrors. We'll all freeze soon. I saw the water. When you killed the white walker, almost all the dead that followed ***. Why? Maybe he was the one who turned them. We can go for the walkers. (..)2017 TvShow: Game of Thrones Title: Beyond the Wall Season: 7 Episode 6