Is “Sixties” a Scrabble word?
Yes
SIXTIES
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 Sixties
noun
1.The decade of the 1860s, 1960s, etc. (but especially the 1960s)
2.A period in American history centered around the counterculture movement of the late 1960s.
Synonyms: '60s, 1960s, 60s
noun
1.The decade of one's life from age 60 through age 69.
2.(temperature, rates) The range between 60 and 69.
“Highs in the mid sixties.”
Synonyms: '60s, 1960s, 60s
adjective
1.From or evoking the 61st through 70th years of a century (chiefly the 1960s).