Antonyms of adj counterproductive

1 sense of counterproductive

Sense 1
counterproductive -- (tending to hinder the achievement of a goal)

INDIRECT (VIA harmful) -> harmless -- (not causing or capable of causing harm; "harmless bacteria"; "rendered the bomb harmless")

Similarity of adj counterproductive

1 sense of counterproductive

Sense 1
counterproductive -- (tending to hinder the achievement of a goal)
       => harmful (vs. harmless) -- (causing or capable of causing harm; "too much sun is harmful to the skin"; "harmful effects of smoking")