Brownian motion vs pedesis

Brownian motion and pedesis both are nouns.

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

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

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

Other synonyms of Brownian motion include Brownian movement.

Brownian motion (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