Air current and Harmattan

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

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

Harmattan noun - A dusty wind from the Sahara that blows toward the western coast of Africa during the winter.

Air current and harmattan are semantically related. Sometimes you can use "Air current" instead a noun "Harmattan".