pertinacity vs tenacity

pertinacity and tenacity both are nouns.

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

As nouns, pertinacity and tenacity are synonyms defined as:

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

pertinacity (noun)	tenacity (noun)
persistent determination	persistent determination