chemistry vs reverse osmosis

chemistry and reverse osmosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemistry	Yes	No	No	No
reverse osmosis	Yes	No	No	No

chemistry (noun)	reverse osmosis (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions	(chemistry) a method of producing pure water; a solvent passes through a semipermeable membrane in a direction opposite to that for natural osmosis when it is subjected to a hydrostatic pressure greater than the osmotic pressure
the way two individuals relate to each other
the chemical composition and properties of a substance or object