diplomatist
From Longman Dictionary of Contemporary Englishdiplomatistdi‧plo‧ma‧tist /dɪˈpləʊmətɪst $ -ˈploʊ-/ noun [countable] old-fashioned x-refa diplomatExamples from the Corpusdiplomatist• In Geneva, Reagan and Gorbachev were supported by large, hardworking staffs of diplomatists.• On the whole the professional diplomatists ran this machinery themselves.• All the diplomatists come to me.