tough Synonyms - page 5

adamantine adamant brutal brute complex cohesive cloggy clinging challenging cemental cast iron cassideous cartilaginous callous byzantine burly burdensome bully bullheaded bulldozer able-bodied gluey rocky obdurate muscular muscled mucilaginous meaty manly lusty lout leathery leathern leathered laborious labored knotted kittle killing onerous operose robust rigorous rigid retentive resistive resistant resilient redoubtable punk