chemical action vs chemical process

chemical action and chemical process both are nouns.

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

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

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

Other synonyms of chemical action include chemical change.

chemical action (noun)	chemical process (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