curvature vs waviness

curvature and waviness both are nouns.

Word	Noun	Adjective	Verb	Adverb
curvature	Yes	No	No	No
waviness	Yes	No	No	No

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

Other hyponyms of curvature include curliness, straightness, spoke misalignment.

curvature (noun)	waviness (noun)
the rate of change (at a point) of the angle between a curve and a tangent to the curve	(of hair) a tendency to curl
the property possessed by the curving of a line or surface	unevenness produced by waves or wrinkles
(medicine) a curving or bending; often abnormal