asphyxiation vs choking

asphyxiation and choking both are nouns.

Word	Noun	Adjective	Verb	Adverb
asphyxiation	Yes	No	No	No
choking	Yes	Yes	No	No

As nouns, choking is a hyponym of asphyxiation; that is, choking is a word with a more specific, narrower meaning than asphyxiation:

Other hyponyms of asphyxiation include strangling, strangulation, throttling.

asphyxiation (noun)	choking (noun)
killing by depriving of oxygen	the act of suffocating (someone) by constricting the windpipe
the condition of being deprived of oxygen (as by having breathing stopped)	a condition caused by blocking the airways to the lungs (as with food or swelling of the larynx)

asphyxiation (adjective)	choking (adjective)
	causing difficulty in breathing especially through lack of fresh air and presence of heat