persistent vs pertinacious

persistent and pertinacious both are adjectives.

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

As adjectives, persistent and pertinacious are synonyms defined as:

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

persistent (adjective)	pertinacious (adjective)
retained; not shed	stubbornly unyielding
never-ceasing
stubbornly unyielding
continually recurring to the mind