geodesic vs geodesy

geodesic and geodesy both are nouns.

Word	Noun	Adjective	Verb	Adverb
geodesic	Yes	Yes	No	No
geodesy	Yes	No	No	No

geodesic (noun)	geodesy (noun)
(mathematics) the shortest line between two points on a mathematically defined surface (as a straight line on a plane or an arc of a great circle on a sphere)	the branch of geology that studies the shape of the earth and the determination of the exact position of geographical points

geodesic (adjective)	geodesy (adjective)
of or relating to or determined by geodesy