The best replacement for goodbye is farewell.

The best alternatives to goodbye are rated as following:
★★★★★  farewell
★★★★  bye
★★★  see you later
★★  good bye
★★  chow
★★  goodbye
★★  see you
★★  good-bye
★★  au revoir
★  good by
★  good-by
★  so long
  hello
  farewell difference
  just walk away
  letting go
  bye bye

Your alternative for goodbye is not listed? Suggest!
Speaking about goodbye, one probably shouldn't forget about leaving.

Other search terms related to goodbye and their ratings are:
★★★★★ leaving
★★ soap and skin lyrics
★ hello lyrics
★ saying goodbye
★ closure
ever leaving
You have in mind a companion for goodbye and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of goodbye in all years. Click on graph for more.
goodbye
farewell
bye