traffic island vs safety island

traffic island and safety island both are nouns.

Word	Noun	Adjective	Verb	Adverb
traffic island	Yes	No	No	No
safety island	Yes	No	No	No

As nouns, traffic island and safety island are synonyms defined as:

traffic island and safety island: a curbed area in a roadway from which traffic is excluded; provides safe area for pedestrians

Other synonyms of traffic island include safety isle, safety zone.

traffic island (noun)	safety island (noun)
a curbed area in a roadway from which traffic is excluded; provides safe area for pedestrians	a curbed area in a roadway from which traffic is excluded; provides safe area for pedestrians