concaveness vs contour

concaveness and contour both are nouns.

Word	Noun	Adjective	Verb	Adverb
concaveness	Yes	No	No	No
contour	Yes	No	Yes	No

As nouns, contour is a hypernym of concaveness; that is, contour is a word with a broader meaning than concaveness:

Other hypernyms of concaveness include configuration, conformation, form, shape.

concaveness (noun)	contour (noun)
the property possessed by a concave shape	any spatial attributes (especially as defined by outline)
	a feature (or the order or arrangement of features) of anything having a complex structure
	a line drawn on a map connecting points of equal height

concaveness (verb)	contour (verb)
	form the contours of