extinguish vs quench

extinguish and quench both are verbs.

Word	Noun	Adjective	Verb	Adverb
extinguish	No	No	Yes	No
quench	No	No	Yes	No

As verbs, quench is a hypernym of extinguish; that is, quench is a word with a broader meaning than extinguish:

Other hypernyms of extinguish include blow out, extinguish, snuff out.

As verbs, extinguish and quench are synonyms defined as:

Other synonyms of extinguish include blow out, snuff out.

extinguish (verb)	quench (verb)
put an end to; kill	suppress or crush completely
kill in large numbers	cool (hot metal) by plunging into cold water or other liquid
terminate, end, or take out	reduce the degree of (luminescence or phosphorescence) in (excited molecules or a material) by adding a suitable substance
extinguish by crushing	satisfy (thirst)
put out, as of fires, flames, or lights	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