cerium vs atomic number 58

cerium and atomic number 58 both are nouns.

Word	Noun	Adjective	Verb	Adverb
cerium	Yes	No	No	No
atomic number 58	Yes	No	No	No

As nouns, cerium and atomic number 58 are synonyms defined as:

cerium and atomic number 58: a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group

Other synonyms of cerium include Ce.

cerium (noun)	atomic number 58 (noun)
a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group	a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group