the fact thatimpactfulhas become so entrenched in the language suggests that many people don’t find it to be an exact synonym of those words and that it has shades of meaning all its own.
Therefore, effective is not an exact synonym. Influential, on the other hand, which means “having great influence on someone or something,” seems quite close to impactful. In fact, the same dictionary defines impact as “a marked influence.” What do you think? Does impactful stand shoulder...