wind gauge vs wind gage

wind gauge and wind gage both are nouns.

Word	Noun	Adjective	Verb	Adverb
wind gauge	Yes	No	No	No
wind gage	Yes	No	No	No

As nouns, wind gauge and wind gage are synonyms defined as:

wind gauge and wind gage: a gauge for recording the speed and direction of wind

Other synonyms of wind gauge include anemometer.

wind gauge (noun)	wind gage (noun)
a gauge for recording the speed and direction of wind	a gauge for recording the speed and direction of wind