gasp vs inhalation

gasp and inhalation both are nouns.

Word	Noun	Adjective	Verb	Adverb
gasp	Yes	No	Yes	No
inhalation	Yes	No	No	No

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

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

Other hypernyms of gasp include aspiration, breathing in, inspiration, intake.

gasp (noun)	inhalation (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
	a medication to be taken by inhaling it

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