atomic number 57 vs lanthanum

atomic number 57 and lanthanum both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 57	Yes	No	No	No
lanthanum	Yes	No	No	No

As nouns, atomic number 57 and lanthanum are synonyms defined as:

atomic number 57 and lanthanum: a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth

Other synonyms of atomic number 57 include La.

atomic number 57 (noun)	lanthanum (noun)
a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth	a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth