baking soda vs bicarbonate

baking soda and bicarbonate both are nouns.

Word	Noun	Adjective	Verb	Adverb
baking soda	Yes	No	No	No
bicarbonate	Yes	No	No	No

As nouns, bicarbonate is a hypernym of baking soda; that is, bicarbonate is a word with a broader meaning than baking soda:

baking soda: a white soluble compound (NaHCO3) used in effervescent drinks and in baking powders and as an antacid
bicarbonate: a salt of carbonic acid (containing the anion HCO3) in which one hydrogen atom has been replaced; an acid carbonate

Other hypernyms of baking soda include hydrogen carbonate.

baking soda (noun)	bicarbonate (noun)
a white soluble compound (NaHCO3) used in effervescent drinks and in baking powders and as an antacid	a salt of carbonic acid (containing the anion HCO3) in which one hydrogen atom has been replaced; an acid carbonate