efficiency
I
noun
ability, ableness, adeptness, adroitness, capability, capableness, command, competence, competency, deftness, dexterity, dexterousness, effectiveness, efficacy, efficientia, excellence, expertness, handiness, helpfulness, mastery, potency, productiveness, proficiency, prowess, quickness, resourcefulness, skill, skillfulness, vis
II
index
caliber (mental capacity), qualification (fitness)
Burton's Legal Thesaurus.
William C. Burton.
2006