Crash landing and Forced landing

Crash landing noun - An emergency landing under circumstances where a normal landing is impossible (usually damaging the aircraft).

Forced landing and crash landing are semantically related. In some cases you can use "Forced landing" instead a noun phrase "Crash landing".

Forced landing noun - An unscheduled airplane landing that is made under circumstances (engine failure or adverse weather) not under the pilot's control.

Crash landing and forced landing are semantically related. Sometimes you can replace phrase "Crash landing" with "Forced landing", this phrases are similar.