osmium vs atomic number 76

osmium and atomic number 76 both are nouns.

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

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

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

Other synonyms of osmium include Os.

osmium (noun)	atomic number 76 (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