The best replacement for wind speed is knots.

The best alternatives to wind speed are rated as following:
★★★★★  knots
★★★★★  psf
★★★★  gust
★★★  wind load
★★★  power output
★★  wave height
★★  air pressure
★★  wind chill
★  wind gust
★  wind pressure
★  wind force
  wind speed
  power generation

Your alternative for wind speed is not listed? Suggest!
Speaking about wind speed, one probably shouldn't forget about hurricane.

Other search terms related to wind speed and their ratings are:
★★★★★ hurricane
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wind speed
knots
psf