Devonian vs Age of Fishes

Devonian and Age of Fishes both are nouns.

Word	Noun	Adjective	Verb	Adverb
Devonian	Yes	No	No	No
Age of Fishes	Yes	No	No	No

As nouns, Devonian and Age of Fishes are synonyms defined as:

Devonian and Age of Fishes: the period from 405 million to 345 million years ago; characterized by preponderance of fishes and appearance of amphibians and ammonites

Other synonyms of Devonian include Devonian period.

Devonian (noun)	Age of Fishes (noun)
the period from 405 million to 345 million years ago; characterized by preponderance of fishes and appearance of amphibians and ammonites	the period from 405 million to 345 million years ago; characterized by preponderance of fishes and appearance of amphibians and ammonites