suppress vs quench

suppress and quench both are verbs.

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

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

suppress (verb)	quench (verb)
bring under control by force or authority	suppress or crush completely
lessen to the point of stopping	cool (hot metal) by plunging into cold water or other liquid
put out of one's consciousness	reduce the degree of (luminescence or phosphorescence) in (excited molecules or a material) by adding a suitable substance
consciously restrain from showing; of emotions, desires, impulses, or behavior	satisfy (thirst)
come down on or keep down by unjust use of one's authority	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