effective

Synonyms: able active adequate capable cogent compelling competent convincing direct effectual efficacious efficient emphatic energetic forceful forcible having lead in pencil impressive live moving on the ball operative playing hardball potent powerful powerhouse practical producing resultant serviceable serving sound striking sufficient telling trenchant useful valid virtuous wicked yielding

Antonyms: fruitless impotent incapable ineffective unproductive useless weak

Synonyms: active actual current direct dynamic in effect in execution in force in operation operative real

Antonyms: inoperative useless