mercurous chloride vs calomel

mercurous chloride and calomel both are nouns.

Word	Noun	Adjective	Verb	Adverb
mercurous chloride	Yes	No	No	No
calomel	Yes	No	No	No

As nouns, mercurous chloride and calomel are synonyms defined as:

mercurous chloride and calomel: a tasteless colorless powder used medicinally as a cathartic

mercurous chloride (noun)	calomel (noun)
a tasteless colorless powder used medicinally as a cathartic	a tasteless colorless powder used medicinally as a cathartic