Cd vs atomic number 48

Cd and atomic number 48 both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cd	Yes	No	No	No
atomic number 48	Yes	No	No	No

As nouns, Cd and atomic number 48 are synonyms defined as:

Cd and atomic number 48: a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores

Other synonyms of Cd include cadmium.

Cd (noun)	atomic number 48 (noun)
a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores	a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores