golden age vs age

golden age and age both are nouns.

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

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

golden age: any period (sometimes imaginary) of great peace and prosperity and happiness
age: an era of history having some distinctive feature

Other hypernyms of golden age include historic period.

golden age (noun)	age (noun)
any period (sometimes imaginary) of great peace and prosperity and happiness	how long something has existed
a time period when some activity or skill was at its peak	a time of life (usually defined in years) at which some particular qualification or power arises
	a late time of life
	an era of history having some distinctive feature
	a prolonged period of time