manganese vs atomic number 25

manganese and atomic number 25 both are nouns.

Word	Noun	Adjective	Verb	Adverb
manganese	Yes	No	No	No
atomic number 25	Yes	No	No	No

As nouns, manganese and atomic number 25 are synonyms defined as:

manganese and atomic number 25: a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals

Other synonyms of manganese include Mn.

manganese (noun)	atomic number 25 (noun)
a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals	a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals