Synonyms of effectiveness in English:

effectiveness

noun

  • 1 we were impressed by the effectiveness of the nontoxic pesticide
    success, productiveness, potency, power;
    benefit, advantage, value, virtue, usefulness
    formal efficacy
  • Definition of effectiveness in:

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    Word of the day flagitious
    Pronunciation: fləˈjiSHəs
    adjective
    (of a person or their actions) criminal; villainous