atomic number 65 vs terbium

atomic number 65 and terbium both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 65	Yes	No	No	No
terbium	Yes	No	No	No

As nouns, atomic number 65 and terbium are synonyms defined as:

atomic number 65 and terbium: a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite

Other synonyms of atomic number 65 include Tb.

atomic number 65 (noun)	terbium (noun)
a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite	a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite