dome vs concave shape

dome and concave shape both are nouns.

Word	Noun	Adjective	Verb	Adverb
dome	Yes	No	No	No
concave shape	Yes	No	No	No

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

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

Other hypernyms of dome include concavity, incurvation, incurvature.

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