PROFICIENT Synonyms: 155 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/proficient
WEBSynonyms for PROFICIENT: skilled, adept, skillful, experienced, expert, practiced, good, educated; Antonyms of PROFICIENT: inexperienced, unskilled, incapable, incompetent, amateur, unable, inexpert, inept.
DA: 56 PA: 47 MOZ Rank: 98