Brownian movement vs pedesis

Brownian movement and pedesis both are nouns.

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

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

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

Other synonyms of Brownian movement include Brownian motion.

Brownian movement (noun)	pedesis (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