atomic number 71 vs lutetium

atomic number 71 and lutetium both are nouns.

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

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

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

Other synonyms of atomic number 71 include Lu, lutecium.

atomic number 71 (noun)	lutetium (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