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- - effectively
  - effects
  - effectual
  - effeminate
  - effervesce
  - effervescence
  - effervescent
  - effete
  - efficacious
  - efficacy
  - efficiency
  - efficient
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efficiency

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definition | English Collocations | Conjugator | in Spanish | in French | in context | images

Inflections of 'efficiency' (n): npl: efficiencies

efficiency
WordReference English Thesaurus © 2026

Sense: Noun: degree of effectiveness

Synonyms:

competence , ability , capability , capableness, skill , talent , expertise , adeptness, skillfulness, skilfulness (UK), proficiency , adequacy, mastery , facility , resourcefulness

Sense: Noun: output ratio

Synonyms:

productivity, performance , effectiveness , productiveness, response , power , potency, yield , output ratio, suitability , economy , adaptability, thoroughness, energy , adequacy, powerfulness, efficacy, proficiency , faculty , facility , practical utility, profitability

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Recent forum discussions about thesaurus entries:

12% higher energy efficiency - English Only forum
a high degree of mobility and an organisational efficiency - English Only forum
a plan not improving efficiency - English Only forum
amount of efficiency - English Only forum
and a burst of efficiency gains followed the adoption... - English Only forum
assuming an average conversion efficiency - English Only forum
at blade tip at peak efficiency point - English Only forum
at the high end of a cost-efficiency range - English Only forum
Bachelor apartment / studio / bedsit / efficiency apartment - English Only forum
broken against her reputation for rock-hard efficiency and pragmatism - English Only forum
but what was lost in efficiency was more than made up for in the beauty and richness of the texts - English Only forum
capital <market/ markets/ markets'> efficiency - English Only forum
Commitment was to quality as calculation was to efficiency - English Only forum
commonsense efficiency - English Only forum
Costs may go down, without resulting in a substantial increase in efficiency - English Only forum
decisions from deep intuition rather than from fashion or efficiency - English Only forum
"DXC technology is concerned by researchers due to its high efficiency......". Is " be concerned by " used correctly here? - English Only forum
economy or cost-efficiency of e.g. production + economic - English Only forum
effectivness-efficiency-effectivity - English Only forum
efficacy or efficiency - English Only forum
Efficiency - English Only forum
efficiency agenda - English Only forum
Efficiency experts - English Only forum
efficiency gains - English Only forum
Efficiency in something Vs Efficiency of something - English Only forum
efficiency is of the essence - English Only forum
efficiency of participation - English Only forum
efficiency vs consumption - English Only forum
efficiency vs. effectiveness - English Only forum
efficiency vs. efficient - English Only forum
more...

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