tenacious vs unyielding

tenacious and unyielding both are adjectives.

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

As adjectives, tenacious and unyielding are synonyms defined as:

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

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