tough Synonyms

hard sturdy rugged knotty problematic thick-skinned thorny testing thoroughpaced terrorist tenacious taxing taut swashbuckler superincumbent stubborn struggler strong-minded strongly unfeeling ticklish uncompromising unbending tyrannical trying troublesome troubled trojan tricky thug toughened tormenter toilsome tiring tighter tiger tight strong stringy stringent solid sobering slang-whanger slam-bang sinewy shredded severe serious semibarbarian self-assertive