It's νικητές (nikites).
Edit:Corrected its.
Olympiacos was the winner of the Greek supper cup winner in 19771.
Panathinaikos was the Greek Super League winner in 1930.
Olympiacos was the Greek Super League winner in 1931.
Olympiacos was the Greek Super League winner in 1933.
Olympiacos was the Greek Super League winner in 1934.
Olympiacos was the Greek Super League winner in 1936.
Olympiacos was the Greek Super League winner in 1937.
Olympiacos was the Greek Super League winner in 1938.
Olympiacos was the Greek Super League winner in 1947.
Olympiacos was the Greek Super League winner in 1948.
Panathinaikos was the Greek Super League winner in 1949.
Olympiacos was the Greek Super League winner in 1951.