lutetium vs lutecium

lutetium and lutecium both are nouns.

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

As nouns, lutetium and lutecium are synonyms defined as:

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

Other synonyms of lutetium include atomic number 71, Lu.

lutetium (noun)	lutecium (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