island dispenser vs petrol pump

island dispenser and petrol pump both are nouns.

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

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

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

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

island dispenser (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