quench vs stub out

quench and stub out both are verbs.

Word	Noun	Adjective	Verb	Adverb
quench	No	No	Yes	No
stub out	No	No	Yes	No

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

Other hyponyms of quench include crush out, extinguish, press out, stub, douse, put out.

quench (verb)	stub out (verb)
suppress or crush completely	extinguish by crushing
cool (hot metal) by plunging into cold water or other liquid
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