What is the difference between zionism and judaism?

Zionism is a nationalist political movement.

Judaism is an ancient religion.

Zionism is the nationalist movement of the State of Israel. Judaism is a religion.

A Zionist can be of any religion, over 99.9 percent of Jews worldwide are Zionist but there are some anti-Zionist Jewish groups and anti-Zionist Jewish individuals. Zionism is a political philosophy that advocates for the rebirth of the Jewish state of Israel in its historical place. Arthur Balfour a Christian prime minister of the United Kingdom was an important early Zionist

Judaism is the Jewish religion. Zionism is the desire for a Jewish nation in the land of Israel. It is possible to be Jewish and not Zionist.

Not much depending on what data you read on both....there like 2 peas in a pod although not exclusively paired in all underhandedness