strangulation vs asphyxiation

strangulation and asphyxiation both are nouns.

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

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

strangulation: the act of suffocating (someone) by constricting the windpipe
asphyxiation: killing by depriving of oxygen

Other hypernyms of strangulation include suffocation.

strangulation (noun)	asphyxiation (noun)
the act of suffocating (someone) by constricting the windpipe	killing by depriving of oxygen
(pathology) constriction of a body part so as to cut off the flow of blood or other fluid	the condition of being deprived of oxygen (as by having breathing stopped)
the condition of having respiration stopped by compression of the air passage