abscission vs cutting off

abscission and cutting off both are nouns.

Word	Noun	Adjective	Verb	Adverb
abscission	Yes	No	No	No
cutting off	Yes	No	No	No

As nouns, abscission and cutting off are synonyms defined as:

abscission (noun)	cutting off (noun)
the act of cutting something off	the act of shortening something by chopping off the ends
shedding of flowers and leaves and fruit following formation of scar tissue in a plant	the act of cutting something off