goodbye
1. [ noun ] a farewell remark
Synonyms: good-bye adieu adios cheerio au_revoir auf_wiedersehen good_day good-by goodby bye-bye bye sayonara so_long arrivederci
Examples:

"they said their good-byes"

Related terms: farewell
Similar spelling:   goodby
  Godby
  good-bye
  good-by
  Godbey
  Godbee
  go_deep