atomic number 99 vs E

atomic number 99 and E both are nouns.

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

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

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

Other synonyms of atomic number 99 include einsteinium, Es.

atomic number 99 (noun)	E (noun)
a radioactive transuranic element produced by bombarding plutonium with neutrons	the 5th letter of the Roman alphabet
	the cardinal compass point that is at 90 degrees
	a radioactive transuranic element produced by bombarding plutonium with neutrons
	a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body