gage vs pluviometer

gage and pluviometer both are nouns.

Word	Noun	Adjective	Verb	Adverb
gage	Yes	No	Yes	No
pluviometer	Yes	No	No	No

As nouns, pluviometer is a hyponym of gage; that is, pluviometer is a word with a more specific, narrower meaning than gage:

gage: a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc.
pluviometer: gauge consisting of an instrument to measure the quantity of precipitation

gage (noun)	pluviometer (noun)
a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc.	gauge consisting of an instrument to measure the quantity of precipitation
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gage (verb)	pluviometer (verb)
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