fomentation vs instigation

fomentation and instigation both are nouns.

Word	Noun	Adjective	Verb	Adverb
fomentation	Yes	No	No	No
instigation	Yes	No	No	No

As nouns, fomentation and instigation are synonyms defined as:

fomentation and instigation: deliberate and intentional triggering (of trouble or discord)

fomentation (noun)	instigation (noun)
deliberate and intentional triggering (of trouble or discord)	deliberate and intentional triggering (of trouble or discord)
application of warm wet coverings to a part of the body to relieve pain and inflammation	the verbal act of urging on
a substance used as a warm moist medicinal compress or poultice