Is “Comeback” a Scrabble word?
Yes
COMEBACK
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 Comeback
/ˈkʌmbæk/
noun
1.A return (e.g. to popularity, success, etc.) after an extended period of obscurity.
“That fad went out with the eighties, but I think it's making a comeback.”
2.A retort or answer, particularly a quick or clever one.
“I wish I had thought of a quick comeback for his comment.”
3.An occurrence of an athlete or sports team in a competition overcoming a substantial disadvantage in points to win or draw.
Synonyms: rejoinder, retort