persistence vs pertinacity

persistence and pertinacity both are nouns.

Word	Noun	Adjective	Verb	Adverb
persistence	Yes	No	No	No
pertinacity	Yes	No	No	No

As nouns, persistence and pertinacity are synonyms defined as:

Other synonyms of persistence include doggedness, perseverance, persistency, tenaciousness, tenacity.

persistence (noun)	pertinacity (noun)
the act of persisting or persevering; continuing or repeating behavior	persistent determination
persistent determination
the property of a continuous and connected period of time