spark counter vs spark chamber

spark counter and spark chamber both are nouns.

Word	Noun	Adjective	Verb	Adverb
spark counter	Yes	No	No	No
spark chamber	Yes	No	No	No

As nouns, spark counter and spark chamber are synonyms defined as:

spark counter and spark chamber: an instrument that detects ionizing radiation from elementary particles

spark counter (noun)	spark chamber (noun)
an instrument that detects ionizing radiation from elementary particles	an instrument that detects ionizing radiation from elementary particles