As nouns,
conservation of mass is a hyponym of
conservation; that is,
conservation of mass is a
word with a more specific, narrower meaning than
conservation:
- conservation: (physics) the maintenance of a certain quantities unchanged during chemical reactions or physical transformations
- conservation of mass: a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system
Other hyponyms of conservation include
conservation of charge,
conservation of electricity,
conservation of energy,
first law of thermodynamics,
law of conservation of energy,
conservation of matter,
law of conservation of mass,
law of conservation of matter,
conservation of momentum,
conservation of parity,
mirror symmetry,
parity,
space-reflection symmetry.