Gd vs atomic number 64

Gd and atomic number 64 both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gd	Yes	No	No	No
atomic number 64	Yes	No	No	No

As nouns, Gd and atomic number 64 are synonyms defined as:

Gd and atomic number 64: a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group

Other synonyms of Gd include gadolinium.

Gd (noun)	atomic number 64 (noun)
a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group	a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group