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Efficacyefficiency vs Effectiveness - What's the difference?

efficacyefficiency | effectiveness |

Efficacyefficiency is likely misspelled.


Efficacyefficiency has no English definition.

As a noun effectiveness is

the property of being effective, of achieving results.

efficacyefficiency

Not English

Efficacyefficiency has no English definition. It may be misspelled.

effectiveness

Noun

(-)
  • The property of being effective, of achieving results.
  • The effectiveness of the drug was well established.
  • The capacity or potential for achieving results.
  • *
  • The degree to which something achieves results.
  • He questioned the effectiveness of the treatment.
  • * 2013 , Phil McNulty, "[http://www.bbc.co.uk/sport/0/football/23830980]", BBC Sport , 1 September 2013:
  • United were having more possession but a sign of the effectiveness of Liverpool's defence was that it took the visitors 76 minutes to force Mignolet into serious action, when he dived to punch away a shot from substitute Nani.