unyielding vs tenacious

unyielding and tenacious both are adjectives.

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

As adjectives, unyielding and tenacious are synonyms defined as:

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

unyielding (adjective)	tenacious (adjective)
resistant to physical force or pressure	good at remembering
stubbornly unyielding	sticking together
	stubbornly unyielding