airbrake vs constraint

airbrake and constraint both are nouns.

Word	Noun	Adjective	Verb	Adverb
airbrake	Yes	No	No	No
constraint	Yes	No	No	No

As nouns, constraint is a hypernym of airbrake; that is, constraint is a word with a broader meaning than airbrake:

airbrake: a small parachute or articulated flap to reduce the speed of an aircraft
constraint: a device that retards something's motion

Other hypernyms of airbrake include restraint.

airbrake (noun)	constraint (noun)
a vehicular brake that operates by compressed air; especially for heavy vehicles	the act of constraining; the threat or use of force to control the thoughts or behavior of others
a small parachute or articulated flap to reduce the speed of an aircraft	a device that retards something's motion
	the state of being physically constrained