incisiveness vs trenchancy

incisiveness and trenchancy both are nouns.

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

As nouns, incisiveness and trenchancy are synonyms defined as:

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

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