expert

Synonyms: able adept adroit apt big league clever crack crackerjack deft dexterous experienced facile handy practiced professional qualified savvy schooled sharp skilled skillful slick trained virtuoso

Antonyms: amateur inexpert unknowledgeable unskilled untrained

Synonyms: ace adept artist artiste authority buff connoisseur doyen graduate guru hot shot old hand old pro phenomenon pro professional proficient shark virtuoso whiz wizard

Antonyms: amateur apprentice ignoramus novice