Pennsylvanian period vs Pennsylvanian

Pennsylvanian period and Pennsylvanian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pennsylvanian period	Yes	No	No	No
Pennsylvanian	Yes	No	No	No

As nouns, Pennsylvanian period and Pennsylvanian are synonyms defined as:

Pennsylvanian period and Pennsylvanian: the period from 310 million to 280 million years ago; characterized by warm climate and swampy land

Other synonyms of Pennsylvanian period include Upper Carboniferous, Upper Carboniferous period.

Pennsylvanian period (noun)	Pennsylvanian (noun)
the period from 310 million to 280 million years ago; characterized by warm climate and swampy land	a native or resident of Pennsylvania
	the period from 310 million to 280 million years ago; characterized by warm climate and swampy land