The best replacement for adapter is converter.

The best alternatives to adapter are rated as following:
★★★★★  converter
★★★★★  adaptor
★★  bridge
★★  facade
★★  transformer
★★  fm transmitter
★  router
★  proxy
★  pci
★  wrapper
★  innovator
★  converter europe
★  pci card
★  dongle
★  adaptor dictionary
★  interface
★  access point
★  connector
  converter difference
  wireless router
  adapterview
  wireless card
  voltage converter
  fitting
  adapter
  decorator
  wireless bridge
  bridge pattern
  ethernet adapter
  ethernet
  r11s adapter
  ac adapter
  lingo compatible router
  ethernet controller
  usb adapter
  wireless pci card
  modem
  pci wireless adapter
  usb
  early adopter
  usb wireless adapter
  3.16a
  90w ac adapter
  facade pattern
  facade design pattern
  dc adapter
  apple vga adapter
  dvi

Your alternative for adapter is not listed? Suggest!
Speaking about adapter, one probably shouldn't forget about usb charger.

Other search terms related to adapter and their ratings are:
★★★★★ usb charger
★★★ dongle
★★ usb port
★ cable
★ horizontalscrollview
★ ethernet port
bluetooth
You have in mind a companion for adapter and it is not yet here? Propose!



Google Trends

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