Is “Dub” a Scrabble word?
Yes
DUB
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 Dub
/dʌb/
verb
1.To confer knighthood; the conclusion of the ceremony was marked by a tap on the shoulder with a sword.
2.To name, to entitle, to call.
3.To deem.