trenchant vs hard-hitting

trenchant and hard-hitting both are adjectives.

Word	Noun	Adjective	Verb	Adverb
trenchant	No	Yes	No	No
hard-hitting	No	Yes	No	No

As adjectives, trenchant and hard-hitting are synonyms defined as:

trenchant (adjective)	hard-hitting (adjective)
clearly or sharply defined to the mind	aggressively and persistently persuasive
characterized by or full of force and vigor	characterized by or full of force and vigor
having keenness and forcefulness and penetration in thought, expression, or intellect