Cambrian period vs Cambrian

Cambrian period and Cambrian both are nouns.

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

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

Cambrian period and Cambrian: the period from 544 million to about 500 million years ago; characterized by marine invertebrates

Cambrian period (noun)	Cambrian (noun)
the period from 544 million to about 500 million years ago; characterized by marine invertebrates	a native or resident of Wales
	the period from 544 million to about 500 million years ago; characterized by marine invertebrates

Cambrian period (adjective)	Cambrian (adjective)
	of or relating to or characteristic of Wales or its people or their language