stub vs extinguish

stub is a noun but extinguish is not a noun.

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

As verbs, stub and extinguish are synonyms defined as:

Other synonyms of stub include crush out, press out, stub out.

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

Other hypernyms of stub include blow out, quench, snuff out.

stub (noun)	extinguish (noun)
the small unused part of something (especially the end of a cigarette that is left after smoking)
a torn part of a ticket returned to the holder as a receipt
the part of a check that is retained as a record
a short piece remaining on a trunk or stem where a branch is lost
a small piece

stub (verb)	extinguish (verb)
strike (one's toe) accidentally against an object	put an end to; kill
clear of weeds by uprooting them	kill in large numbers
extinguish by crushing	terminate, end, or take out
pull up (weeds) by their roots	extinguish by crushing
	put out, as of fires, flames, or lights