Is “Overtrick” a Scrabble word?
Yes
OVERTRICK
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 Overtrick
noun
1.A trick won by the declarer's side which exceeds the amount of the contract