entasis vs convex shape

entasis and convex shape both are nouns.

Word	Noun	Adjective	Verb	Adverb
entasis	Yes	No	No	No
convex shape	Yes	No	No	No

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

entasis: a slight convexity in the shaft of a column; compensates for the illusion of concavity that viewers experience when the sides are perfectly straight
convex shape: a shape that curves or bulges outward

Other hypernyms of entasis include convexity.

entasis (noun)	convex shape (noun)
a slight convexity in the shaft of a column; compensates for the illusion of concavity that viewers experience when the sides are perfectly straight	a shape that curves or bulges outward