Is “Op” a Scrabble word?
Yes
OP
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 Op
noun
1.An operation.
“My mother's going in for her knee op today.”
2.An amateur radio operator.
3.An operator on IRC, who can moderate the chat channel, ban users, etc.
verb
1.To promote (an IRC user) to an operator.