sodium bicarbonate vs sodium hydrogen carbonate

sodium bicarbonate and sodium hydrogen carbonate both are nouns.

Word	Noun	Adjective	Verb	Adverb
sodium bicarbonate	Yes	No	No	No
sodium hydrogen carbonate	Yes	No	No	No

As nouns, sodium bicarbonate and sodium hydrogen carbonate are synonyms defined as:

sodium bicarbonate and sodium hydrogen carbonate: a white soluble compound (NaHCO3) used in effervescent drinks and in baking powders and as an antacid

Other synonyms of sodium bicarbonate include baking soda, bicarbonate of soda, saleratus.

sodium bicarbonate (noun)	sodium hydrogen carbonate (noun)
a white soluble compound (NaHCO3) used in effervescent drinks and in baking powders and as an antacid	a white soluble compound (NaHCO3) used in effervescent drinks and in baking powders and as an antacid