Brownian movement vs Brownian motion

Brownian movement and Brownian motion both are nouns.

Word	Noun	Adjective	Verb	Adverb
Brownian movement	Yes	No	No	No
Brownian motion	Yes	No	No	No

As nouns, Brownian movement and Brownian motion are synonyms defined as:

Brownian movement and Brownian motion: the random motion of small particles suspended in a gas or liquid

Other synonyms of Brownian movement include pedesis.

Brownian movement (noun)	Brownian motion (noun)
the random motion of small particles suspended in a gas or liquid	the random motion of small particles suspended in a gas or liquid