efficiency

noun

1 there was a need to reform local government to bring greater efficiency:

organization, order, orderliness, planning, regulation, logicality, coherence, productivity, effectiveness, cost-effectiveness.

▷antonyms inefficiency.

2 I must compliment you all on your efficiency and your bravery:

competence, capability, ability, proficiency, adeptness, deftness, expertise, professionalism, skilfulness, skill, effectiveness, productivity, organization.

▷antonyms incompetence.

efficiency Oxford Dictionary of English