equatorial vs tropic

equatorial and tropic both are nouns.

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

equatorial (noun)	tropic (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	either of two parallels of latitude about 23.5 degrees to the north and south of the equator representing the points farthest north and south at which the sun can shine directly overhead and constituting the boundaries of the Torrid Zone or tropics

equatorial (adjective)	tropic (adjective)
of or existing at or near the geographic equator	relating to or situated in or characteristic of the tropics (the region on either side of the equator)
of or relating to conditions at the geographical equator	of weather or climate; hot and humid as in the tropics
of or relating to or at an equator