Pr vs atomic number 59

Pr and atomic number 59 both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pr	Yes	No	No	No
atomic number 59	Yes	No	No	No

As nouns, Pr and atomic number 59 are synonyms defined as:

Pr and atomic number 59: a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process

Other synonyms of Pr include praseodymium.

Pr (noun)	atomic number 59 (noun)
a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process	a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process