cyma vs ogee

cyma and ogee both are nouns.

Word	Noun	Adjective	Verb	Adverb
cyma	Yes	No	No	No
ogee	Yes	No	No	No

As nouns, ogee is a hyponym of cyma; that is, ogee is a word with a more specific, narrower meaning than cyma:

cyma: (architecture) a molding for a cornice; in profile it is shaped like an S (partly concave and partly convex)
ogee: a molding that (in section) has the shape of an S with the convex part above and the concave part below

Other hyponyms of cyma include cyma recta, cyma reversa.

cyma (noun)	ogee (noun)
(architecture) a molding for a cornice; in profile it is shaped like an S (partly concave and partly convex)	a molding that (in section) has the shape of an S with the convex part above and the concave part below