petrol pump vs island dispenser

petrol pump and island dispenser both are nouns.

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

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

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

Other synonyms of petrol pump include gas pump, gasoline pump.

petrol pump (noun)	island dispenser (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