bloom vs bloom of youth

bloom and bloom of youth both are nouns.

Word	Noun	Adjective	Verb	Adverb
bloom	Yes	No	Yes	No
bloom of youth	Yes	No	No	No

As nouns, bloom and bloom of youth are synonyms defined as:

Other synonyms of bloom include salad days.

bloom (noun)	bloom of youth (noun)
a powdery deposit on a surface	the best time of youth
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)	bloom of youth (verb)
produce or yield flowers