The library was a safe haven for students to study.
security blanket
Frequency:
60
%
Carrying her security blanket helped calm her nerves.
secure zone
Frequency:
50
%
The embassy is a secure zone for diplomats.
protected area
Frequency:
45
%
The national park is a protected area for wildlife.
Idiomatic Expressions for safety zone
Phrase: step out of your safety zone
Meaning: to do something that is outside of one's comfort zone
Usage: In order to grow as a person, you need to step out of your safety zone and try new things.