coherent vs tenacious

coherent and tenacious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
coherent	No	Yes	No	No
tenacious	No	Yes	No	No

As adjectives, coherent and tenacious are synonyms defined as:

coherent (adjective)	tenacious (adjective)
marked by an orderly, logical, and aesthetically consistent relation of parts	good at remembering
(physics) of waves having a constant phase relation	sticking together
sticking together	stubbornly unyielding
capable of thinking and expressing yourself in a clear and consistent manner