unyielding, steadfast, single-minded, determined, rebellious, unshakable, persistent, headstrong, bullheaded, tough, tenacious, willful, persevering, set in stone, stiff, hard-nosed, unmovable, unrelenting
stubborn
Tenacious or stubborn are both synonyms for doggedly.
The primary synonym would be "stubborn".
Hardheaded and stubborn can mean the same thing. They are synonyms. Hardheaded can also mean realistic and pragmatic, but usually it means stubborn. If someone is stubborn they could be called hardheaded and vis-versa
determined, persistent, stubborn, resolute, tenacious, steadfast, obstinate, indefatigable
determined, firm, fixed, stubborn, resolute, uncompromising, unbending, obdurate
The definition of the word willful is 'someone who is deliberately stubborn, headstrong or self-willed'. Synonyms of the word include adamant, bullheaded, and inflexible.
The word "headstrong" means determined, and implies an aggressive or obstinate approach to a course of action. Other synonyms are "willful" or "stubborn".
The noun form of the adjective 'stubborn' is stubbornness.
more stubborn, most stubborn
This child is so stubborn. Why do you act so stubborn?
Stubborn = Uparty.