trenchancy vs effectivity

trenchancy and effectivity both are nouns.

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

As nouns, effectivity is a hypernym of trenchancy; that is, effectivity is a word with a broader meaning than trenchancy:

trenchancy: keenness and forcefulness of thought or expression or intellect
effectivity: power to be effective; the quality of being able to bring about an effect

Other hypernyms of trenchancy include effectiveness, effectuality, effectualness.

trenchancy (noun)	effectivity (noun)
keenness and forcefulness of thought or expression or intellect	power to be effective; the quality of being able to bring about an effect