
Substitute
Temporary Replacement
Refers to someone who takes a place for a short time, not permanently.
Sara was a substitute teacher for just one week.
Not Identical
The substitute might be similar but not exactly the same as what it replaces.
Almond milk can be a good substitute for cow's milk in recipes.
Plan B
A substitute often acts as a backup option when the original is unavailable.
An in-class assignment was the substitute for the canceled field trip.