adamant, cantankerous, contradictory, contrary, contumacious, convinced, determined, dogged, dogmatic, firm, hard, hardened, headstrong, heady, immovable, indomitable, inflexible, intractable,...
Stubborn
Both are correct.
Synonym means: a word having the same or nearly the same meaning as another in the language. Definition means: the act of defining or making definite, distinct, or clear / the formal statement of the...
The word no can be replaced in some contexts by none, negative, zero, or nothing.