flower vs golden age

flower and golden age both are nouns.

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

As nouns, golden age is a hyponym of flower; that is, golden age is a word with a more specific, narrower meaning than flower:

flower (noun)	golden age (noun)
a plant cultivated for its blooms or blossoms	any period (sometimes imaginary) of great peace and prosperity and happiness
reproductive organ of angiosperm plants especially one having showy or colorful parts	a time period when some activity or skill was at its peak
the period of greatest prosperity or productivity

flower (verb)	golden age (verb)
produce or yield flowers