What is another word for thermal motion?
Pronunciation: [θˈɜːmə͡l mˈə͡ʊʃən] (IPA) 
Thermal motion refers to the movement of particles in a substance due to the energy they possess based on their temperature. Synonyms for thermal motion include Brownian motion, random motion, kinetic energy, and thermal vibration. Brownian motion specifically refers to the random movement of particles in a fluid due to the collisions of the particles with the fluid molecules. Random motion and thermal vibration are general terms that describe the movement of particles in a substance due to their temperature. Kinetic energy specifically refers to the energy of motion possessed by particles in a substance. All of these terms can be used interchangeably when discussing the movement of particles due to their thermal energy.
