flatness

1 antonym for flatness — opposites grouped by meaning.

Noun — The quality of being flat.

Synonyms by Meaning

The quality of being flat.

“The flatness of the landscape facilitates views right across the Firth of Forth to Fife, before the railway begins to pierce the Edinburgh suburbs.”

matt planeness languor lethargy phlegm matte sluggishness lusterlessness lustrelessness mat

The quality of being dull or lacking interest.

Opposites

flavor

flavor

Comes from Middle English flatnesse, equivalent to flat and -ness.

Matt flavor mat matte sluggishness languor phlegm lethargy