substitutor

the teacher used a substitutor during her absence.

a good substitutor can maintain the class's momentum.

finding a suitable substitutor is crucial for the project.

the substitutor was well-prepared for the lecture.

she acted as a substitutor for the main speaker.

we need a substitutor who is familiar with the topic.

the substitutor's performance impressed everyone.

he was chosen as the substitutor for the tournament.

a reliable substitutor can ease the transition.

the company hired a substitutor to fill in for the manager.