curved shape vs undulation

undulation vs curved shape

curved shape and undulation both are nouns.

Word	Noun	Adjective	Verb	Adverb
curved shape	Yes	No	No	No
undulation	Yes	No	No	No

As nouns, undulation is a hyponym of curved shape; that is, undulation is a word with a more specific, narrower meaning than curved shape:

curved shape: the trace of a point whose direction of motion changes
undulation: an undulating curve

Other hyponyms of curved shape include bell-shaped curve, Gaussian curve, Gaussian shape, normal curve, meander, closed curve, S-shape, catenary, Cupid's bow, wave, extrados, gooseneck, intrados, bend, crook, turn, twist, crotchet, hook, envelope, arc, crenation, crenature, crenel, crenelle, scallop, spiral, helix, spiral, perversion, sinuosity, sinuousness, arch, bell, bell shape, campana, arc, bow, crescent, quadric, quadric surface, lemniscate, line roulette, roulette, pedal curve, indifference curve, demand curve, polygonal chain, conchoid, brachistochrone, supply curve, cosine curve, cotangent curve, tangent curve.

curved shape (noun)	undulation (noun)
the trace of a point whose direction of motion changes	(physics) a movement up and down or back and forth
	wavelike motion; a gentle rising and falling in the manner of waves
	an undulating curve

Difference between curved shape and undulation

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