First class and Unreliable

Opposite meaning terms

First class noun - Mail that includes letters and postcards and packages sealed against inspection.

Show all Definitions

Unreliable is an antonym for first class in topics: pleasant, honorable.

Unreliable adjective - Not worthy of reliance or trust.

Show all Definitions

First class is an antonym for unreliable.

Nearby Words: unreliability, unreliably

Cite this Source

Unreliable and First class. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/first_class/unreliable

First class & Unreliable. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/first_class/unreliable>.

Unreliable or First class. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/first_class/unreliable.

Google Ngram Viewer shows how "first class" and "unreliable" have occurred on timeline