Air current and Headwind

Air current noun - Air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure.

Headwind and air current are semantically related. In some cases you can replace term "Headwind" with "Air current", this terms are similar.

Headwind noun - Wind blowing opposite to the path of a ship or aircraft.

Air current and headwind are semantically related. Sometimes you can use "Air current" instead a noun "Headwind".