Fluent
Fluent adjective - Able to express oneself clearly and well.
Proficient and fluent are semantically related. In some cases you can use "Proficient" instead an adjective "Fluent".
Proficient
Proficient adjective - Having or showing exceptional knowledge, experience, or skill in a field of endeavor.
Fluent and proficient are semantically related. Sometimes you can use "Fluent" instead the word "Proficient" as an adjective or a noun.
Nearby Words: proficiency, proficiently
Both words in one sentence
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Bilingual Bonus: Anyone proficient or fluent in a Slavic language will be able to at least partially understand Natalya.
Source: Comic Book / Y: The Last Man -
Strangely enough, they are interspaced with people fluent in Russian, and in at least one case, an actor highly proficient or fluent in Russian speaking lines written by someone who was not, true to script, complete with every single error.
Source: Series / NCIS -
When he arrives in England, he's proficient enough to hold fluent conversations with natives.
Source: Series / Vikings
Cite this Source
Proficient and Fluent. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/fluent/proficient
Fluent & Proficient. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/fluent/proficient>.
Proficient or Fluent. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/fluent/proficient.
Google Ngram Viewer shows how "fluent" and "proficient" have occurred on timeline