Neolithic Age vs Neolithic

Neolithic Age and Neolithic both are nouns.

Word	Noun	Adjective	Verb	Adverb
Neolithic Age	Yes	No	No	No
Neolithic	Yes	No	No	No

As nouns, Neolithic Age and Neolithic are synonyms defined as:

Neolithic Age and Neolithic: latest part of the Stone Age beginning about 10,000 BC in the Middle East (but later elsewhere)

Other synonyms of Neolithic Age include New Stone Age.

Neolithic Age (noun)	Neolithic (noun)
latest part of the Stone Age beginning about 10,000 BC in the Middle East (but later elsewhere)	latest part of the Stone Age beginning about 10,000 BC in the Middle East (but later elsewhere)