sparker vs spark arrester

sparker and spark arrester both are nouns.

Word	Noun	Adjective	Verb	Adverb
sparker	Yes	No	No	No
spark arrester	Yes	No	No	No

As nouns, sparker and spark arrester are synonyms defined as:

sparker and spark arrester: a wire net to stop sparks from an open fireplace or smokestack

sparker (noun)	spark arrester (noun)
a wire net to stop sparks from an open fireplace or smokestack	a wire net to stop sparks from an open fireplace or smokestack
	electrical device to reduce sparking when electrical contacts are opened or closed