chemical change vs chemical action

chemical change and chemical action both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemical change	Yes	No	No	No
chemical action	Yes	No	No	No

As nouns, chemical change and chemical action are synonyms defined as:

chemical change and chemical action: (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved

Other synonyms of chemical change include chemical process.

chemical change (noun)	chemical action (noun)
(chemistry) any process determined by the atomic and molecular composition and structure of the substances involved	(chemistry) any process determined by the atomic and molecular composition and structure of the substances involved