island dispenser vs gasoline pump

island dispenser and gasoline pump both are nouns.

Word	Noun	Adjective	Verb	Adverb
island dispenser	Yes	No	No	No
gasoline pump	Yes	No	No	No

As nouns, island dispenser and gasoline pump are synonyms defined as:

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

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

island dispenser (noun)	gasoline 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