heyday vs efflorescence

heyday and efflorescence both are nouns.

Word	Noun	Adjective	Verb	Adverb
heyday	Yes	No	No	No
efflorescence	Yes	No	No	No

As nouns, heyday and efflorescence are synonyms defined as:

heyday and efflorescence: the period of greatest prosperity or productivity

Other synonyms of heyday include bloom, blossom, flower, flush, peak, prime.

heyday (noun)	efflorescence (noun)
the period of greatest prosperity or productivity	a powdery deposit on a surface
	the time and process of budding and unfolding of blossoms
	any red eruption of the skin
	the period of greatest prosperity or productivity