asphyxiator vs extinguisher

asphyxiator and extinguisher both are nouns.

Word	Noun	Adjective	Verb	Adverb
asphyxiator	Yes	No	No	No
extinguisher	Yes	No	No	No

As nouns, asphyxiator and extinguisher are synonyms defined as:

asphyxiator and extinguisher: a manually operated device for extinguishing small fires

Other synonyms of asphyxiator include fire extinguisher.

asphyxiator (noun)	extinguisher (noun)
a manually operated device for extinguishing small fires	a manually operated device for extinguishing small fires