WordNet sense 1 (originally a stronghold captured by David (the 2nd king of the Israelites); above it was built a temple and later the name extended to the whole hill; finally it became a synonym for the city of Jerusalem):

Zion

WordNet sense 2 (Jewish republic in southwestern Asia at eastern end of Mediterranean; formerly part of Palestine):

Israel, Yisrael, State of Israel

WordNet sense 3 (an imaginary place considered to be perfect or ideal):

utopia