Angle of attack and Incidence angle

Angle of attack noun - The acute angle between the direction of the undisturbed relative wind and the chord of an airfoil.

Incidence angle and angle of attack are semantically related. In some cases you can use "Incidence angle" instead a noun phrase "Angle of attack".

Incidence angle noun - The angle that a line makes with a line perpendicular to the surface at the point of incidence.

Angle of attack and incidence angle are semantically related. Sometimes you can replace phrase "Angle of attack" with "Incidence angle", this phrases are similar.