different between flatness vs straightness

English

From Middle English flatnesse, equivalent to flat +? -ness.

flatness (countable and uncountable, plural flatnesses)

The state of being flat
The state of being two-dimensional; planar : planarity
The state of being bland : dullness
Mattness, the quality of a painted surface which scatters or absorbs the light falling on it, so as to be substantially free from gloss or sheen
(oenology) Lack of bouquet and freshness of a wine, through too much aeration or infection with film yeasts
(statistics) slim-tailedness or platykurticity

From Middle English streightnes, equivalent to straight +? -ness. Cognate with Scots strauchtness, straichtness (“straightness”).

straightness (countable and uncountable, plural straightnesses)

(uncountable) The state or quality of being straight (especially in the sense of "heterosexual").
(countable) The result or product of being straight.

Send