potassium hydrogen carbonate vs potassium bicarbonate

potassium hydrogen carbonate and potassium bicarbonate both are nouns.

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

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

potassium hydrogen carbonate and potassium bicarbonate: a crystalline salt (KHCO3) that is used in baking powder and as an antacid

Other synonyms of potassium hydrogen carbonate include potassium acid carbonate.

potassium hydrogen carbonate (noun)	potassium bicarbonate (noun)
a crystalline salt (KHCO3) that is used in baking powder and as an antacid	a crystalline salt (KHCO3) that is used in baking powder and as an antacid