island dispenser vs gas pump

island dispenser and gas pump both are nouns.

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

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

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

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

island dispenser (noun)	gas 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