atomic number 71 vs Lu

atomic number 71 and Lu both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 71	Yes	No	No	No
Lu	Yes	No	No	No

As nouns, atomic number 71 and Lu are synonyms defined as:

atomic number 71 and Lu: a trivalent metallic element of the rare earth group; usually occurs in association with yttrium

Other synonyms of atomic number 71 include lutecium, lutetium.

atomic number 71 (noun)	Lu (noun)
a trivalent metallic element of the rare earth group; usually occurs in association with yttrium	a trivalent metallic element of the rare earth group; usually occurs in association with yttrium