The best replacement for dongle is adapter.

The best alternatives to dongle are rated as following:
★★★★★  adapter
★★★★★  mifi
★★★  data card
★★★  tethering
★★★  broadband
★★★  wireless card
★★★  modem
★★  mobile wifi
★★  cfw
★  wifi card
★  built in wifi
★  bluetooth adapter
★  wifi router
  pci card
  data cable

Your alternative for dongle is not listed? Suggest!
Speaking about dongle, one probably shouldn't forget about free laptop.

Other search terms related to dongle and their ratings are:

★★★★★ free laptop
★★★★★ adapter
★★ unlimited internet
You have in mind a companion for dongle and it is not yet here? Propose!

Google Trends

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