46 synonyms for impactful such as commanding, attention-grabbing, and captivating. Impactful is an adjective, and its antonyms are ineffective and insignificant.
Attention-grabbing, Captivating, Commanding, Compelling, Dramatic, Dynamic, Effective, Engaging, Enlightening, Essential, Evocative, Exceptional, Eye-opening, Far-reaching, Forceful, Gripping, Groundbreaking, High-impact, Important, Impressive, Influential, Inspiring, Life-changing, Meaningful, Memorable, Moving, Notable, Noteworthy, Outstanding, Persuasive, Pivotal, Powerful, Provocative, Resonant, Revelatory, Significant, Stirring, Striking, Strong, Touching, Transformational, Transformative, Unforgettable, Vital, and Weighty.