sal soda vs washing soda

sal soda and washing soda both are nouns.

Word	Noun	Adjective	Verb	Adverb
sal soda	Yes	No	No	No
washing soda	Yes	No	No	No

As nouns, sal soda and washing soda are synonyms defined as:

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

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

sal soda (noun)	washing soda (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