Find Synonyms

diagonal Synonyms

Another word for diagonal

Choosing another word for diagonal depends on context, so the synonyms and similar words below are separated across 2 exact definitions and ranked by match strength.
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• adjective (Context 1)

Joining two opposite corners of a square, rectangle, or other straight-sided shape; having a slanting or oblique direction.

Usage Example

"She drew a slanting line across the page to divide the chart into two triangles."

Strongest
slanting
oblique
Strong
slanted
catacorner
cater-cornered
angled
Weak
askew

• noun (Context 2)

A straight line joining two nonadjacent vertices of a polygon or polyhedron, or running at a slant across a surface.

Usage Example

"The two diagonals of a square intersect at a right angle in the exact center."

Strong
slant
oblique

Opposites of diagonal

The opposite of diagonal shifts depending on context. Common opposites include:

horizontal
vertical
perpendicular
level
See all opposites of diagonal

• Nearby Words

diagnostic
diagnostician
diagnostics
diagonal
diagonally
diagram
diagrammatic

Cite this Entry

Wordmom. (2026). Synonyms for Diagonal. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/diagonal
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