cool down vs quench

cool down and quench both are verbs.

Word	Noun	Adjective	Verb	Adverb
cool down	No	No	Yes	No
quench	No	No	Yes	No

As verbs, quench is a hyponym of cool down; that is, quench is a word with a more specific, narrower meaning than cool down:

Other hyponyms of cool down include ice, refrigerate.

cool down (verb)	quench (verb)
make cool or cooler	suppress or crush completely
loose heat	cool (hot metal) by plunging into cold water or other liquid
lose intensity	reduce the degree of (luminescence or phosphorescence) in (excited molecules or a material) by adding a suitable substance
	satisfy (thirst)
	suppress (sparking) when the current is cut off in an inductive circuit, or suppress (an oscillation or discharge) in a component or device
	put out, as of fires, flames, or lights