Is “Watcher” a Scrabble word?
Yes
WATCHER
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Watcher
/ˈwɒtʃə(ɹ)/
noun
1.Someone who watches or observes.
2.Someone who keeps vigil.
3.A guard.