tenacious vs coherent

tenacious and coherent both are adjectives.

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

As adjectives, tenacious and coherent are synonyms defined as:

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