asphyxiation vs hypoxia

asphyxiation and hypoxia both are nouns.

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

As nouns, hypoxia is a hypernym of asphyxiation; that is, hypoxia is a word with a broader meaning than asphyxiation:

asphyxiation: the condition of being deprived of oxygen (as by having breathing stopped)
hypoxia: oxygen deficiency causing a very strong drive to correct the deficiency

asphyxiation (noun)	hypoxia (noun)
killing by depriving of oxygen	oxygen deficiency causing a very strong drive to correct the deficiency
the condition of being deprived of oxygen (as by having breathing stopped)