Sion vs Dead Sea

Sion and Dead Sea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sion	Yes	No	No	No
Dead Sea	Yes	No	No	No

Sion (noun)	Dead Sea (noun)
an imaginary place considered to be perfect or ideal	a saltwater lake on the border between Israel and Jordan; its surface in 1292 feet below sea level
Jewish republic in southwestern Asia at eastern end of Mediterranean; formerly part of Palestine
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