Offtime is a term used to describe time spent away from work or other responsibilities. Antonyms for offtime could be time spent in work or being busy. However, there are more specific antonyms for the term which include "overtime", "workaholic", and "all-nighter", which indicate working beyond normal hours. Other antonyms could be "overburdened", "overworked", "stressed out", or "burned out", implying excessive workload or the feeling of being overwhelmed. "Restlessness", "anxiety", "ambition" or "drive" are also opposite traits to offtime, indicating a desire to keep busy and pursue goals or passions. The antonyms for offtime suggest that individuals vary in their desire for leisure or work and that balance is necessary for a healthy lifestyle.