relief
/ɹɪˈliːf/noun
Definitions
The removal of stress or discomfort.
Example: I sighed with relief when I found out that my daughter hadn't got lost, but was waiting for me at home.
The feeling associated with the removal of stress or discomfort.
Release from a post or duty, as when replaced by another.
The person who takes over a shift for another.
Example: Officer Schmidt can finally go home because his relief has arrived.