#word_of_farewell__farewell  an acknowledgment or expression of goodwill at parting
  supertype:  acknowledgment__acknowledgement  a statement acknowledging something or someone
  subtype:  adieu__adios__adio__arrivederci__auf_wiedersehen__aufwiedersehen__au_revoir__bye__bye-bye__byebye__cheerio__good-by__goodby__good-bye__goodbye__good_day__sayonara__so_long  a farewell remark; "they said their good-byes"
  subtype:  bon_voyage__bonvoyage__send-off  an organized expression of goodwill at the start of a trip or new venture
  subtype:  good_morning__morning  a conventional expression of greeting or farewell
  subtype:  good_afternoon__afternoon  a conventional expression of greeting or farewell
  subtype:  good_night  a conventional expression of farewell

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