soda vs washing soda

soda and washing soda both are nouns.

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

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

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

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

soda (noun)	washing soda (noun)
a sweet drink containing carbonated water and flavoring	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