Interim
/ˈɪntəɹɪm/
noun
A transitional or temporary period between other events.
“His car is in the shop, but they gave him a rental to drive in the interim.”
Synonyms: between-time
adjective
Transitional.
“Iraq's government is interim.”
Temporary.
“You are interim manager until he returns from hospital.”
Synonyms: caretaker, provisional