einsteinium vs atomic number 99

einsteinium and atomic number 99 both are nouns.

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

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

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

Other synonyms of einsteinium include E, Es.

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