Proficient
Proficient adjective - Having or showing exceptional knowledge, experience, or skill in a field of endeavor.
Sly and proficient are semantically related. In some cases you can use "Sly" instead an adjective "Proficient".
Nearby Words: proficiency, proficiently
Sly
Sly adjective - Clever at attaining one's ends by indirect and often deceptive means.
Proficient and sly are semantically related. Sometimes you can use "Proficient" instead an adjective "Sly".
Cite this Source
Sly and Proficient. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/proficient/sly
Proficient & Sly. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/proficient/sly>.
Sly or Proficient. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/proficient/sly.
Google Ngram Viewer shows how "proficient" and "sly" have occurred on timeline