gag vs tag line

gag and tag line both are nouns.

Word	Noun	Adjective	Verb	Adverb
gag	Yes	No	Yes	No
tag line	Yes	No	No	No

gag (noun)	tag line (noun)
restraint put into a person's mouth to prevent speaking or shouting	the point of a joke or humorous story
a humorous anecdote or remark intended to provoke laughter

gag (verb)	tag line (verb)
struggle for breath; have insufficient oxygen intake
make an unsuccessful effort to vomit; strain to vomit
cause to retch or choke
make jokes or quips
be too tight; rub or press
tie a gag around someone's mouth in order to silence them
prevent from speaking out