submaster

About 0.01 uses per million words.

Meaning

1. noun A key that can open several locks, but fewer than a master key.
2. noun A copy of a master copy of a recording, generally kept for archival purposes.
3. noun A secondary or subsidiary schoolmaster.

Similar words

subagent subadar subbranch subcentral master subordinator sublessor subeditor maister masterdom

Often followed by

keys control of is and key