undulation

In music|lang=en terms the difference between undulation and swell

is that undulation is (music) a tremulous tone produced by a peculiar pressure of the finger on a string while swell is (music) a division in a pipe organ, usually the largest enclosed division.

As nouns the difference between undulation and swell

is that undulation is an instance or act of undulating while swell is the act of swelling.

As a verb swell is

to become bigger, especially due to being engorged.

As an adjective swell is

excellent.

Knoll is a related term of undulation.

As nouns the difference between knoll and undulation

is that knoll is bulb while undulation is an instance or act of undulating.

As nouns the difference between undulation and spray

is that undulation is an instance or act of undulating while spray is spray.

As nouns the difference between deviation and undulation

is that deviation is diversion; different route to travel while undulation is an instance or act of undulating.

As nouns the difference between convolution and undulation

is that convolution is something that is folded or twisted while undulation is an instance or act of undulating.

As a noun undulation

is an instance or act of undulating.

As a verb fluctuate is

to vary irregularly; to swing.

Hill is a related term of undulation.

As a proper noun hill

is ; the us congress.

As a noun undulation is

an instance or act of undulating.

Mount is a related term of undulation.

As a proper noun mount

is .

As a noun undulation is

an instance or act of undulating.

Winding is a related term of undulation.

As nouns the difference between winding and undulation

is that winding is something wound around something else or winding can be the act or process of winding (turning around) while undulation is an instance or act of undulating.

As a verb winding

is or winding can be .

As an adjective winding

is twisting, turning or sinuous.