gasoline pump vs petrol pump

gasoline pump and petrol pump both are nouns.

Word	Noun	Adjective	Verb	Adverb
gasoline pump	Yes	No	No	No
petrol pump	Yes	No	No	No

As nouns, gasoline pump and petrol pump are synonyms defined as:

gasoline pump and petrol pump: a pump in a service station that draws gasoline from underground storage tanks

Other synonyms of gasoline pump include gas pump, island dispenser.

gasoline pump (noun)	petrol pump (noun)
a pump in a service station that draws gasoline from underground storage tanks	a pump in a service station that draws gasoline from underground storage tanks