41 synonyms for proactive such as alert, active, and agile. Proactive is an adjective, and its antonyms are reactive for passive.
Active, Agile, Alert, Ambitious, Anticipatory, Assertive, Decisive, Driven, Dynamic, Eager, Effective, Efficient, Energetic, Engaged, Enterprising, Forceful, Foreseeing, Forward-thinking, Hands-on, Immediate, Initiative-taking, Involved, Motivated, On-the-ball, Preemptive, Preemptory, Prepared, Prepared-in-advance, Preventative, Preventive, Productive, Prompt, Quick-acting, Ready, Ready-to-act, Resourceful, Responsive, Self-starting, Strategic, and Vigilant.