He snapped at me for the slightest mistake.

In other words, they are used to name, rather than to describe. They are apposite nouns and not adjectives.

It was likewiſe cuſtomary to drink hard at theſe kinds of feaſts; yet it ſeems, according to the ſame author [Posidonius], that the coryphee, or head-gueſt, always began firſt, and put the cup, or rather pitcher, about to his next neighbour, till it had gone round: for, it ſeems, they all drank out of the ſame veſſel, and no man could drink till it came to his turn, nor refuſe when it did.

Angles likewise which insist on the Diameter, are all Right Angles.