Coriaceous

1. (a.) Consisting of or resembling, leather; leatherlike; tough.

2. (a.) Stiff, like leather or parchment.

Thesaurus Entries

cartilaginous, cohesive, coriaceous, durable, fibrous, gristly, hard, hardy, lasting, leatherlike, leathery, resistant, ropy, sinewy, stiff, stringy, strong, stubborn, tenacious, tough, tough as leather, untiring, vigorous, viscid, wiry