Elizabethan age vs Elizabethan era

Elizabethan age and Elizabethan era both are nouns.

Word	Noun	Adjective	Verb	Adverb
Elizabethan age	Yes	No	No	No
Elizabethan era	Yes	No	No	No

As nouns, Elizabethan age and Elizabethan era are synonyms defined as:

Elizabethan age and Elizabethan era: a period in British history during the reign of Elizabeth I in the 16th century; an age marked by literary achievement and domestic prosperity

Elizabethan age (noun)	Elizabethan era (noun)
a period in British history during the reign of Elizabeth I in the 16th century; an age marked by literary achievement and domestic prosperity	a period in British history during the reign of Elizabeth I in the 16th century; an age marked by literary achievement and domestic prosperity