atomic number 66 vs Dy

atomic number 66 and Dy both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 66	Yes	No	No	No
Dy	Yes	No	No	No

As nouns, atomic number 66 and Dy are synonyms defined as:

atomic number 66 and Dy: a trivalent metallic element of the rare earth group; forms compounds that are highly magnetic

Other synonyms of atomic number 66 include dysprosium.

atomic number 66 (noun)	Dy (noun)
a trivalent metallic element of the rare earth group; forms compounds that are highly magnetic	a trivalent metallic element of the rare earth group; forms compounds that are highly magnetic