bloom vs heyday

bloom and heyday both are nouns.

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

As nouns, bloom and heyday are synonyms defined as:

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

bloom (noun)	heyday (noun)
a powdery deposit on a surface	the period of greatest prosperity or productivity
reproductive organ of angiosperm plants especially one having showy or colorful parts
the organic process of bearing flowers
a rosy color (especially in the cheeks) taken as a sign of good health
the best time of youth
the period of greatest prosperity or productivity

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