head·mas·ter 
(hĕdmăs′tər)
(hĕdmăs′tər)n.
A man who is the principal of a school, usually a private school.
- conceitedly
- conceitedness
- conceivability
- conceivable
- conceivableness
- conceivably
- conceive
- conceiver
- concelebrant
- concelebrate
- concelebration
- concenter
- concentrate
- concentration
- concentration camp
- concentration gradient
- concentrative
- concentratively
- concentrator
- concentric
- concentrical
- concentrically
- concentricity
- Concepción
- concept