Wiktionary
superhard
a. Having a very high hardness
Usage examples of "superhard".
In another moment it seemed to be in a rictus of agony, its superhard armor crumbling from it like plaster, as it stood in the center of a globe of transplendence.
Scott's Alpha backed in at its nose, tailerons folding, and a complex joining took place in seconds, with a clanging of superhard alloy.
Possible applications for superhard materials could have major benefits for American industry.
They were nearly there when a passing Officer noticed them and skidded to a halt, heels striking sparks from the superhard substance of the floor.