heyday vs flower

heyday and flower both are nouns.

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

As nouns, heyday and flower are synonyms defined as:

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

heyday (noun)	flower (noun)
the period of greatest prosperity or productivity	a plant cultivated for its blooms or blossoms
	reproductive organ of angiosperm plants especially one having showy or colorful parts
	the period of greatest prosperity or productivity

heyday (verb)	flower (verb)
	produce or yield flowers