What is the difference between microburst and windshear? When I read about these weather phenomena, I find that both of them depict the same thing, and have the same actions to avoid. So why are they differentiated?


http://www.myairlineflight.com/windshear.html
https://en.wikipedia.org/wiki/Microburst
A microburst is generally an intense down draft while wind shear can occur in any direction. It might be safe to say that a microburst is windshear but not all windshear is a microburst. From your linked pages 


  A microburst is intense small-scale downdraft produced by a thunderstorm or rain shower.


and


  Windshear is any rapid change in wind direction and/or speed.