n. 25B6; noun EXPERT, authority, pundit, professional; connoisseur; master, maestro, adept, virtuoso; informal pro, buff, ace, whizz, hotshot; Brit. informal dab hand; N. Amer. informal maven.
amateur.
SPECIALIST
Meaning of SPECIALIST in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012