Nd vs neodymium

Nd and neodymium both are nouns.

Word	Noun	Adjective	Verb	Adverb
Nd	Yes	No	No	No
neodymium	Yes	No	No	No

As nouns, Nd and neodymium are synonyms defined as:

Nd and neodymium: a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium

Other synonyms of Nd include atomic number 60.

Nd (noun)	neodymium (noun)
a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium	a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium