sodium carbonate vs soda ash

sodium carbonate and soda ash both are nouns.

Word	Noun	Adjective	Verb	Adverb
sodium carbonate	Yes	No	No	No
soda ash	Yes	No	No	No

As nouns, sodium carbonate and soda ash are synonyms defined as:

sodium carbonate and soda ash: a sodium salt of carbonic acid; used in making soap powders and glass and paper

Other synonyms of sodium carbonate include sal soda, soda, washing soda.

sodium carbonate (noun)	soda ash (noun)
a sodium salt of carbonic acid; used in making soap powders and glass and paper	a sodium salt of carbonic acid; used in making soap powders and glass and paper