equatorial vs polar

equatorial is a noun but polar is not a noun.

Word	Noun	Adjective	Verb	Adverb
equatorial	Yes	Yes	No	No
polar	No	Yes	No	No

equatorial (noun)	polar (noun)
a telescope whose mounting has only two axes of motion, one parallel to the Earth's axis and the other one at right angles to it

equatorial (adjective)	polar (adjective)
of or existing at or near the geographic equator	of or existing at or near a geographical pole or within the Arctic or Antarctic Circles
of or relating to conditions at the geographical equator	located at or near or coming from the earth's poles
of or relating to or at an equator	having a pair of equal and opposite charges
	extremely cold
	being of crucial importance
	characterized by opposite extremes; completely opposed