persistent vs tenacious

persistent and tenacious both are adjectives.

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

As adjectives, persistent and tenacious are synonyms defined as:

Other synonyms of persistent include dogged, dour, pertinacious, unyielding.

persistent (adjective)	tenacious (adjective)
retained; not shed	good at remembering
never-ceasing	sticking together
stubbornly unyielding	stubbornly unyielding
continually recurring to the mind