breathing in vs gasp

breathing in and gasp both are nouns.

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

As nouns, gasp is a hyponym of breathing in; that is, gasp is a word with a more specific, narrower meaning than breathing in:

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

Other hyponyms of breathing in include pant, drag, puff, pull.

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

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