atomic number 99 vs einsteinium

atomic number 99 and einsteinium both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 99	Yes	No	No	No
einsteinium	Yes	No	No	No

As nouns, atomic number 99 and einsteinium are synonyms defined as:

atomic number 99 and einsteinium: a radioactive transuranic element produced by bombarding plutonium with neutrons

Other synonyms of atomic number 99 include E, Es.

atomic number 99 (noun)	einsteinium (noun)
a radioactive transuranic element produced by bombarding plutonium with neutrons	a radioactive transuranic element produced by bombarding plutonium with neutrons