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certification

mastery

UK /ˌsɜː.tɪ.fɪˈkeɪ.ʃən/ US /ˌsɝ.tɪ.fɪˈkeɪ.ʃən/noun

card 1 of 10 · synonym

Which word is closest in meaning to 'certification' in this sentence?

The certification of the new members was a formal ceremony.