trenchant vs efficacious

trenchant and efficacious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
trenchant	No	Yes	No	No
efficacious	No	Yes	No	No

trenchant (adjective)	efficacious (adjective)
clearly or sharply defined to the mind	marked by qualities giving the power to produce an intended effect
characterized by or full of force and vigor	producing or capable of producing an intended result or having a striking effect
having keenness and forcefulness and penetration in thought, expression, or intellect