e vs E

e and E both are nouns.

Word	Noun	Adjective	Verb	Adverb
e	Yes	No	No	No
E	Yes	No	No	No

As nouns, e and E are synonyms defined as:

e (noun)	E (noun)
the 5th letter of the Roman alphabet	the 5th letter of the Roman alphabet
the base of the natural system of logarithms; approximately equal to 2.718282...	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