hydrargyrum vs mercury

hydrargyrum and mercury both are nouns.

Word	Noun	Adjective	Verb	Adverb
hydrargyrum	Yes	No	No	No
mercury	Yes	No	No	No

As nouns, hydrargyrum and mercury are synonyms defined as:

hydrargyrum and mercury: a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures

Other synonyms of hydrargyrum include atomic number 80, Hg, quicksilver.

hydrargyrum (noun)	mercury (noun)
a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures	temperature measured by a mercury thermometer
	a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures