incurvation vs concavity

incurvation and concavity both are nouns.

Word	Noun	Adjective	Verb	Adverb
incurvation	Yes	No	No	No
concavity	Yes	No	No	No

As nouns, incurvation and concavity are synonyms defined as:

Other synonyms of incurvation include concave shape, incurvature.

incurvation (noun)	concavity (noun)
the action of creating a curved shape	the property possessed by a concave shape
a shape that curves or bends inward	a shape that curves or bends inward