gasp vs breathing in

gasp and breathing in both are nouns.

Word	Noun	Adjective	Verb	Adverb
gasp	Yes	No	Yes	No
breathing in	Yes	No	No	No

As nouns, breathing in is a hypernym of gasp; that is, breathing in is a word with a broader meaning than gasp:

gasp: a short labored intake of breath with the mouth open
breathing in: the act of inhaling; the drawing in of air (or other gases) as in breathing

Other hypernyms of gasp include aspiration, inhalation, inspiration, intake.

gasp (noun)	breathing in (noun)
a short labored intake of breath with the mouth open	the act of inhaling; the drawing in of air (or other gases) as in breathing

gasp (verb)	breathing in (verb)
breathe noisily, as when one is exhausted