lutetium vs Lu

lutetium and Lu both are nouns.

Word	Noun	Adjective	Verb	Adverb
lutetium	Yes	No	No	No
Lu	Yes	No	No	No

As nouns, lutetium and Lu are synonyms defined as:

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

Other synonyms of lutetium include atomic number 71, lutecium.

lutetium (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