secondary vs primary

secondary and primary both are nouns.

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

secondary (noun)	primary (noun)
coil such that current is induced in it by passing a current through the primary coil	a preliminary election where delegates or nominees are chosen
the defensive football players who line up behind the linemen	one of the main flight feathers projecting along the outer edge of a bird's wing
	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

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