stub vs crush out

stub is a noun but crush out is not a noun.

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

As verbs, stub and crush out are synonyms defined as:

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

stub (noun)	crush out (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)	crush out (verb)
strike (one's toe) accidentally against an object	extinguish by crushing
clear of weeds by uprooting them
extinguish by crushing
pull up (weeds) by their roots