ogee vs cymatium

ogee and cymatium both are nouns.

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

As nouns, cymatium is a hypernym of ogee; that is, cymatium is a word with a broader meaning than ogee:

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

Other hypernyms of ogee include cyma.

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