time period vs Paleolithic Age

time period and Paleolithic Age both are nouns.

Word	Noun	Adjective	Verb	Adverb
time period	Yes	No	No	No
Paleolithic Age	Yes	No	No	No

time period (noun)	Paleolithic Age (noun)
an amount of time	second part of the Stone Age beginning about 750,000 to 500,000 years BC and lasting until the end of the last ice age about 8,500 years BC