IPA: //ˈkaʊn.sɪl.ər.ʃɪp//
KK: /ˈkaʊnslərˌʃɪp/
The role or position of being a member of a council, which is a group of people who make decisions or give advice on specific issues.
She was elected to the councillorship after a competitive election.
Councillorship is formed from "council" (from Old French *conseil*, meaning a group of people convened for advice or decision-making) and "-orship" (a suffix denoting a state or condition). The word refers to the state or condition of being a member of a council.
Think of a 'council' as a group of people making decisions together, and '-orship' indicating a role or state. This helps you remember that 'councillorship' is the state of being part of that decision-making group.
No commonly confused words.