dome vs incurvation

dome and incurvation both are nouns.

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

As nouns, incurvation is a hypernym of dome; that is, incurvation is a word with a broader meaning than dome:

dome: a concave shape whose distinguishing characteristic is that the concavity faces downward
incurvation: a shape that curves or bends inward

Other hypernyms of dome include concave shape, concavity, incurvature.

dome (noun)	incurvation (noun)
a hemispherical roof	the action of creating a curved shape
a stadium that has a roof	a shape that curves or bends inward
informal terms for a human head
a concave shape whose distinguishing characteristic is that the concavity faces downward