safety island vs traffic island

safety island and traffic island both are nouns.

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

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

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

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

safety island (noun)	traffic 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