indicator vs chemistry

indicator and chemistry both are nouns.

Word	Noun	Adjective	Verb	Adverb
indicator	Yes	No	No	No
chemistry	Yes	No	No	No

indicator (noun)	chemistry (noun)
a device for showing the operating condition of some system	the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time	the way two individuals relate to each other
a signal for attracting attention	the chemical composition and properties of a substance or object
(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction