headmaster or headmistressnoun

• consternation
• constipate
• constipation
• constituency
• constituent
• constitute
• constitution
• constitutional
• constitutionalism
• constitutional law
• constitutionally
• constitutive
• constrain
• constrained
• constraint
• constrict
• constrictor
• construct
• construction
• constructive
• constructivism
• construe
• consubstantial
• consubstantiation
• consuetude