chemical process vs chemical action

chemical process and chemical action both are nouns.

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

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

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

Other synonyms of chemical process include chemical change.

chemical process (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