hydrargyrum vs Hg

hydrargyrum and Hg both are nouns.

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

As nouns, hydrargyrum and Hg are synonyms defined as:

hydrargyrum and Hg: 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, mercury, quicksilver.

hydrargyrum (noun)	Hg (noun)
a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures	a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures