atomic number 93 vs neptunium

atomic number 93 and neptunium both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 93	Yes	No	No	No
neptunium	Yes	No	No	No

As nouns, atomic number 93 and neptunium are synonyms defined as:

atomic number 93 and neptunium: a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium

Other synonyms of atomic number 93 include Np.

atomic number 93 (noun)	neptunium (noun)
a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium	a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium