Is “Gainsay” a Scrabble word?
Yes
GAINSAY
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 Gainsay
/ˈɡeɪnˌseɪ/
verb
1.To say something in contradiction to.
Synonyms: controvert, deny, dispute, refute, withsay