fire extinguisher vs extinguisher

fire extinguisher and extinguisher both are nouns.

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

As nouns, fire extinguisher and extinguisher are synonyms defined as:

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

Other synonyms of fire extinguisher include asphyxiator.

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