extinguish vs get rid of

extinguish and get rid of both are verbs.

Word	Noun	Adjective	Verb	Adverb
extinguish	No	No	Yes	No
get rid of	No	No	Yes	No

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

Other hypernyms of extinguish include do away with, eliminate, extinguish.

As verbs, extinguish and get rid of are synonyms defined as:

Other synonyms of extinguish include do away with, eliminate.

extinguish (verb)	get rid of (verb)
put an end to; kill	terminate, end, or take out
kill in large numbers	dispose of
terminate, end, or take out	do away with
extinguish by crushing
put out, as of fires, flames, or lights