The position, office, or role of jointly serving as chairman with another person.
From 'cochairman' plus '-ship' meaning office or position (like in 'friendship' or 'leadership'). The '-ship' suffix creates an abstract noun for a status or role.
The '-ship' suffix is incredibly productive in English—you can add it to almost anything to describe a position or relationship ('membership,' 'friendship,' 'kinship'), which is why we can say 'cochairmanship' without anyone being confused!
Compounds '-man' bias into an abstract noun; reinforces masculine default for leadership roles.
Use 'co-leadership' or 'cochair role' instead.
["co-leadership","cochair role","shared leadership"]
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