trenchancy vs incisiveness

trenchancy and incisiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
trenchancy	Yes	No	No	No
incisiveness	Yes	No	No	No

As nouns, trenchancy and incisiveness are synonyms defined as:

trenchancy and incisiveness: keenness and forcefulness of thought or expression or intellect

trenchancy (noun)	incisiveness (noun)
keenness and forcefulness of thought or expression or intellect	keenness and forcefulness of thought or expression or intellect