atomic theory vs atomistic theory

atomic theory and atomistic theory both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic theory	Yes	No	No	No
atomistic theory	Yes	No	No	No

As nouns, atomic theory and atomistic theory are synonyms defined as:

atomic theory and atomistic theory: (chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles

Other synonyms of atomic theory include atomism, atomist theory.

atomic theory (noun)	atomistic theory (noun)
(chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles	(chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles
a theory of the structure of the atom