strangling vs suffocation

strangling and suffocation both are nouns.

Word	Noun	Adjective	Verb	Adverb
strangling	Yes	No	No	No
suffocation	Yes	No	No	No

As nouns, suffocation is a hypernym of strangling; that is, suffocation is a word with a broader meaning than strangling:

Other hypernyms of strangling include asphyxiation.

strangling (noun)	suffocation (noun)
the act of suffocating (someone) by constricting the windpipe	killing by depriving of oxygen
	the condition of being deprived of oxygen (as by having breathing stopped)