valve vs safety valve

safety valve vs valve

valve and safety valve both are nouns.

Word	Noun	Adjective	Verb	Adverb
valve	Yes	No	No	No
safety valve	Yes	No	No	No

As nouns, safety valve is a hyponym of valve; that is, safety valve is a word with a more specific, narrower meaning than valve:

valve: control consisting of a mechanical device for controlling the flow of a fluid
safety valve: a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level

Other hyponyms of valve include accelerator, throttle, throttle valve, ball valve, butterfly valve, choke, clack, clack valve, clapper valve, exhaust valve, intake valve, poppet, poppet valve, escape, escape cock, escape valve, relief valve, slide valve.

valve (noun)	safety valve (noun)
one of the paired hinged shells of certain molluscs and of brachiopods	a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level
the entire one-piece shell of a snail and certain other molluscs
control consisting of a mechanical device for controlling the flow of a fluid
device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it

Difference between valve and safety valve

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