tenaciousness vs perseverance

tenaciousness and perseverance both are nouns.

Word	Noun	Adjective	Verb	Adverb
tenaciousness	Yes	No	No	No
perseverance	Yes	No	No	No

As nouns, tenaciousness and perseverance are synonyms defined as:

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

tenaciousness (noun)	perseverance (noun)
persistent determination	the act of persisting or persevering; continuing or repeating behavior
	persistent determination