flowering vs blossoming

flowering and blossoming both are nouns.

Word	Noun	Adjective	Verb	Adverb
flowering	Yes	Yes	No	No
blossoming	Yes	No	No	No

As nouns, flowering and blossoming are synonyms defined as:

flowering and blossoming: the time and process of budding and unfolding of blossoms

Other synonyms of flowering include anthesis, efflorescence, florescence, inflorescence.

flowering (noun)	blossoming (noun)
the time and process of budding and unfolding of blossoms	the time and process of budding and unfolding of blossoms
a developmental process

flowering (adjective)	blossoming (adjective)
when a plant is in a state of possessing one or multiple flowers and/or blooms