tenacious Synonyms

coherent dogged unyielding retentive sticky dour steadfast persistent pertinacious spiritful stubborn tireless stiff tough trojan tuff uncompromising unflinching unregenerate strong-minded strong spirited single-minded staunch set sticking self-willed self-assertive sedulous stiff-necked unrelenting unshakable hardheaded unflagging unswerving clingsome strong-willed elephantlike memorious rock-ribbed unabated unbendable unfaltering viscose pigheaded longest unwearied viscid viscous whitleather