The best replacement for online is on-line.

The best alternatives to online are rated as following:
★★★★★  on-line
★★★★  traditional education
★★★  offline
★★★  games
★★  traditional classes
★★  classroom
★★  offline editing
★  brick and mortar
★  traditional college
★  classroom learning
★  on campus
★  netflix
★  print
★  on line
★  traditional learning
★  meetings
★  on-line ap style
★  print media
★  traditional mba
★  inline
★  traditional shopping
★  travel agent
  brick and mortar schools
  invisible
  in store shopping
  line interactive ups
  digital
  offline backup
  in line
  classroom education
  face to face
  face-to-face
  printed newspapers
  at home jobs
  line interactive
  scrabble
  desktop turbotax
  print advertising
  campus
  tetris
  desktop
  live poker
  face to face learning
  download
  connected
  in person
  offline yahoo id
  face to face communication
  turbotax download
  quickbooks
  verizon dsl
  traditional media
  at home
  download turbotax
  on-line grammar
  retail sales
  distance learning
  tech training

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

Other search terms related to online and their ratings are:
★★★★★ libraries
★★★ friends
★★ downloading
★★ flash games
★★ jailbroken ps3
★ free
★ ryan seacrest
★ buffering watch movies
You have in mind a companion for online and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of online in all years. Click on graph for more.
online
on-line
traditional education