safety island vs safety isle

safety island and safety isle both are nouns.

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

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

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

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

safety island (noun)	safety isle (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