golden age vs peak

golden age and peak both are nouns.

Word	Noun	Adjective	Verb	Adverb
golden age	Yes	No	No	No
peak	Yes	No	Yes	No

As nouns, peak is a hypernym of golden age; that is, peak is a word with a broader meaning than golden age:

Other hypernyms of golden age include bloom, blossom, efflorescence, flower, flush, heyday, prime.

golden age (noun)	peak (noun)
any period (sometimes imaginary) of great peace and prosperity and happiness	a brim that projects to the front to shade the eyes
a time period when some activity or skill was at its peak	the top or extreme point of something (usually a mountain or hill)
	the highest point (of something)
	the most extreme possible amount or value
	a V shape
	the highest level or degree attainable; the highest stage of development
	the period of greatest prosperity or productivity

golden age (verb)	peak (verb)
	to reach the highest point; attain maximum intensity, activity