Diagonal and Plumb

Diagonal

Diagonal adjective - Running in a slanting direction.
Usage example: the diagonal design ran up the wall all the way from the lower left to the upper right-hand corner

Plumb is an antonym for diagonal.

Nearby Word: diagonally

Plumb

Plumb adjective - Rising straight up.
Usage example: the wall was not plumb, so everything else in the room was out of kilter

Diagonal is an antonym for plumb.

Cite this Source
Plumb and Diagonal. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/diagonal/plumb
Diagonal & Plumb. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/diagonal/plumb>.
Plumb or Diagonal. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/diagonal/plumb.
Google Ngram Viewer shows how "diagonal" and "plumb" have occurred on timeline