gas gauge vs gasoline gage

gas gauge and gasoline gage both are nouns.

Word	Noun	Adjective	Verb	Adverb
gas gauge	Yes	No	No	No
gasoline gage	Yes	No	No	No

As nouns, gas gauge and gasoline gage are synonyms defined as:

gas gauge and gasoline gage: gauge that indicates the amount of gasoline left in the gasoline tank of a vehicle

Other synonyms of gas gauge include gas gage, gasoline gauge, petrol gage, petrol gauge.

gas gauge (noun)	gasoline gage (noun)
gauge that indicates the amount of gasoline left in the gasoline tank of a vehicle	gauge that indicates the amount of gasoline left in the gasoline tank of a vehicle