gag vs constrict

gag is a noun but constrict is not a noun.

Word	Noun	Adjective	Verb	Adverb
gag	Yes	No	Yes	No
constrict	No	No	Yes	No

As verbs, constrict is a hypernym of gag; that is, constrict is a word with a broader meaning than gag:

Other hypernyms of gag include compact, compress, contract, press, squeeze.

gag (noun)	constrict (noun)
restraint put into a person's mouth to prevent speaking or shouting
a humorous anecdote or remark intended to provoke laughter

gag (verb)	constrict (verb)
struggle for breath; have insufficient oxygen intake	become tight or as if tight
make an unsuccessful effort to vomit; strain to vomit	squeeze or press together
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