submaster

Etymology

From sub- + master.

submaster means A key that can open several locks, but fewer than a master key. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

noun

A key that can open several locks, but fewer than a master key.“In an office, a submaster might open all doors in the accounting department; in an industrial facility, it might open all locks in the loading dock area.”
A copy of a master copy of a recording, generally kept for archival purposes.“Unlike cue or group information, submasters usually actively exist and don't need to be created. Methods for recording channel information into different submasters may vary between consoles.”
A secondary or subsidiary schoolmaster.“Masters […] Submasters […] Teacher of French […] Teacher of drawing”