torr vs millimeter of mercury

torr and millimeter of mercury both are nouns.

Word	Noun	Adjective	Verb	Adverb
torr	Yes	No	No	No
millimeter of mercury	Yes	No	No	No

As nouns, torr and millimeter of mercury are synonyms defined as:

torr and millimeter of mercury: a unit of pressure equal to 0.001316 atmosphere; named after Torricelli

Other synonyms of torr include mm Hg.

torr (noun)	millimeter of mercury (noun)
a unit of pressure equal to 0.001316 atmosphere; named after Torricelli	a unit of pressure equal to 0.001316 atmosphere; named after Torricelli