Nonstandard and Regular

Nonstandard

Nonstandard adjective - Varying from or not adhering to a standard.
Usage example: nonstandard lengths of board

Regular is an antonym for nonstandard in not normal topic.

Regular

Regular adjective - Appearing or occurring repeatedly from time to time.

Nonstandard is an antonym for regular.

Cite this Source
Regular and Nonstandard. (2016). Retrieved 2022, June 26, from https://thesaurus.plus/related/nonstandard/regular
Nonstandard & Regular. N.p., 2016. Web. 26 Jun. 2022. <https://thesaurus.plus/related/nonstandard/regular>.
Regular or Nonstandard. 2016. Accessed June 26, 2022. https://thesaurus.plus/related/nonstandard/regular.
Google Ngram Viewer shows how "nonstandard" and "regular" have occurred on timeline