"effective" synonyms, related words, and opposites

Similar:

effectual, efficacious, operative, in effect, efficient, existent, actual, telling, competent, good, more...

Opposite:

ineffective, useless, futile, inefficient, unproductive

Types:

potent, powerful, mighty, forceful, strong, more...

Meter:

Adjectives:

least, cost, most, total, how, non, date, nominal, highly, mean, simplest

Colors:

blue, green, red, black, white, yellow, orange, purple, silver, gold

Crossword clues:

making a difference, works well, it works, good way, how well, packs a punch, well functioning, it worked, causing change, packing a punch