Constant and Hard hat

Constant adjective - Not undergoing a change in condition.

Hard hat and constant are semantically related. In some cases you can use "Hard hat" instead an adjective "Constant".

Nearby Words: consistent, constantly, constancy, Constance, Constanta

Hard hat noun - A lightweight protective helmet (plastic or metal) worn by construction workers.

Constant and hard hat are semantically related. Sometimes you can use "Constant" instead an adjective phrase "Hard hat".