undulation

As nouns the difference between hillock and undulation

is that hillock is a small hill while undulation is an instance or act of undulating.

Undulation is a related term of tortuousness.

As nouns the difference between undulation and tortuousness

is that undulation is an instance or act of undulating while tortuousness is the property of being tortuous.

Hummock is a related term of undulation.

As nouns the difference between hummock and undulation

is that hummock is a small hill; a hillock; a knoll while undulation is an instance or act of undulating.

Undulation is a related term of sinuosity.

As nouns the difference between undulation and sinuosity

is that undulation is an instance or act of undulating while sinuosity is the property of being sinuous.

In lang=en terms the difference between undulation and bump

is that undulation is a tremulous tone produced by a peculiar pressure of the finger on a string while bump is a dose of a drug such as ketamine or cocaine, when snorted recreationally.

As nouns the difference between undulation and bump

is that undulation is an instance or act of undulating while bump is a light blow or jolting collision.

As a verb bump is

to knock against or run into with a jolt.

As a proper noun Bump is

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Undulation is a related term of contortion.

As nouns the difference between undulation and contortion

is that undulation is an instance or act of undulating while contortion is the act of contorting, twisting or deforming something, especially oneself.

Dune is a related term of undulation.

As a proper noun dune

is an island close to.

As a noun undulation is

an instance or act of undulating.

As a noun undulation is

an instance or act of undulating.

Mound is a synonym of undulation.

As nouns the difference between mound and undulation

is that mound is moon while undulation is an instance or act of undulating.

Coil is a related term of undulation.

As nouns the difference between coil and undulation

is that coil is something wound in the form of a helix or spiral or coil can be a noise, tumult, bustle, or turmoil while undulation is an instance or act of undulating.

As a verb coil

is to wind or reel eg a wire or rope into regular rings, often around a centerpiece.