Efficiency is the ABILITY to accomplish a task with minimal effort and maximum effectiveness. PRODUCTIVITY (12 letters) is the measure of how much work is done in a given amount of time, SUITABILITY (11 letters) is the ABILITY to meet the requirements of a job, ABILITY (7 letters) is the capacity to do something, capableness (11 letters) is the quality of being able to do something, PRODUCTIVENESS (14 letters) is the ABILITY to produce results, ADAPTABILITY (12 letters) is the ABILITY to adjust to changing circumstances, THOROUGHNESS (12 letters) is the quality of being complete and accurate, CAPABILITY (10 letters) is the POWER or ABILITY to do something, ADEQUACY (8 letters) is the quality of being sufficient for a purpose, POWER (5 letters) is the ABILITY to do something, EASE (4 letters) is the quality of being comfortable and effortless, COMPETENCE (10 letters) is the ABILITY to do something successfully, PROFICIENCY (11 letters) is the quality of being skilled, POTENCY (7 letters) is the POWER to produce an effect, MIGHT (5 letters) is the POWER to do something, and FACULTY (7 letters) is the ABILITY to do something.