cardinal compass point vs E

cardinal compass point and E both are nouns.

Word	Noun	Adjective	Verb	Adverb
cardinal compass point	Yes	No	No	No
E	Yes	No	No	No

As nouns, E is a hyponym of cardinal compass point; that is, E is a word with a more specific, narrower meaning than cardinal compass point:

Other hyponyms of cardinal compass point include due north, N, north, northward, due east, east, eastward, due south, S, south, southward, due west, W, west, westward.

cardinal compass point (noun)	E (noun)
one of the four main compass points	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