primary vs secondary

primary and secondary both are nouns.

Word	Noun	Adjective	Verb	Adverb
primary	Yes	Yes	No	No
secondary	Yes	Yes	No	No

primary (noun)	secondary (noun)
a preliminary election where delegates or nominees are chosen	coil such that current is induced in it by passing a current through the primary coil
one of the main flight feathers projecting along the outer edge of a bird's wing	the defensive football players who line up behind the linemen
coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit
(astronomy) a celestial body (especially a star) relative to other objects in orbit around it

primary (adjective)	secondary (adjective)
of first rank or importance or value; direct and immediate rather than secondary	being of second rank or importance or value; not direct or immediate
of or being the essential or basic part	depending on or incidental to what is original or primary
most important element	inferior in rank or status
not derived from or reducible to something else; basic	not of major importance
	belonging to a lower class or rank