n. 25B6; noun SKILL, expertise, experience, accomplishment, competence, mastery, prowess, professionalism, deftness, adroitness, dexterity, finesse, ability, facility; informal know-how.
incompetence.
PROFICIENCY
Meaning of PROFICIENCY in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012