damper vs restraint

damper and restraint both are nouns.

Word	Noun	Adjective	Verb	Adverb
damper	Yes	No	No	No
restraint	Yes	No	No	No

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

damper (noun)	restraint (noun)
a depressing restraint	the act of controlling by restraining someone or something
a device that decreases the amplitude of electronic, mechanical, acoustical, or aerodynamic oscillations	a device that retards something's motion
a movable iron plate that regulates the draft in a stove or chimney or furnace	discipline in personal and social activities
	lack of ornamentation
	a rule or condition that limits freedom
	the state of being physically constrained