i Register
In some senses, watcher is marked as US, historical. Watch for register when choosing this word.
noun
Someone who watches or observes.
Someone who watches or observes.
Someone who keeps vigil.
A guard.
Near-synonyms: watchman, watchwoman
A kind of angel appointed to watch over the human realm, in particular one of those who became fallen angels and begot the Nephilim.
the Book of Watchers