abscission vs shedding

abscission and shedding both are nouns.

Word	Noun	Adjective	Verb	Adverb
abscission	Yes	No	No	No
shedding	Yes	No	No	No

As nouns, shedding is a hypernym of abscission; that is, shedding is a word with a broader meaning than abscission:

abscission: shedding of flowers and leaves and fruit following formation of scar tissue in a plant
shedding: the process whereby something is shed

Other hypernyms of abscission include sloughing.

abscission (noun)	shedding (noun)
the act of cutting something off	loss of bits of outer skin by peeling or shedding or coming off in scales
shedding of flowers and leaves and fruit following formation of scar tissue in a plant	the process whereby something is shed