arrester hook vs restraint

arrester hook and restraint both are nouns.

Word	Noun	Adjective	Verb	Adverb
arrester hook	Yes	No	No	No
restraint	Yes	No	No	No

As nouns, restraint is a hypernym of arrester hook; that is, restraint is a word with a broader meaning than arrester hook:

arrester hook: a restraint that slows airplanes as they land on the flight deck of an aircraft carrier
restraint: a device that retards something's motion

Other hypernyms of arrester hook include constraint.

arrester hook (noun)	restraint (noun)
a restraint that slows airplanes as they land on the flight deck of an aircraft carrier	the act of controlling by restraining someone or something
	a device that retards something's motion
	discipline in personal and social activities
	lack of ornamentation
	a rule or condition that limits freedom
	the state of being physically constrained