Riemannian geometry vs elliptic geometry

Riemannian geometry and elliptic geometry both are nouns.

Word	Noun	Adjective	Verb	Adverb
Riemannian geometry	Yes	No	No	No
elliptic geometry	Yes	No	No	No

As nouns, Riemannian geometry and elliptic geometry are synonyms defined as:

Riemannian geometry and elliptic geometry: (mathematics) a non-Euclidean geometry that regards space as like a sphere and a line as like a great circle

Riemannian geometry (noun)	elliptic geometry (noun)
(mathematics) a non-Euclidean geometry that regards space as like a sphere and a line as like a great circle	(mathematics) a non-Euclidean geometry that regards space as like a sphere and a line as like a great circle