atomic number 76 vs Os

atomic number 76 and Os both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 76	Yes	No	No	No
Os	Yes	No	No	No

As nouns, atomic number 76 and Os are synonyms defined as:

atomic number 76 and Os: a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known

Other synonyms of atomic number 76 include osmium.

atomic number 76 (noun)	Os (noun)
a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known	a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known