Is “Fifties” a Scrabble word?
Yes
FIFTIES
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 Fifties
/ˈfɪftiz/
noun
1.The decade of the 1850s, 1950s, etc.
2.The decade of one's life from age 50 through age 59.
3.(temperature, rates) The range between 50 and 59.
“It can't snow tonight; it's forecast to be in the fifties!”
Synonyms: '50s, 1950s, 50s
adjective
1.From or evoking the 51st through 60th years of a century (chiefly the 1950s).
noun
1.A banknote or coin with a denomination of 50.
“Do you want small bills or are fifties OK?”
2.A batsman's score of at least 50 runs and less than 100 runs.