capital vs primary

capital and primary both are nouns.

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

capital (noun)	primary (noun)
the upper part of a column that supports the entablature	a preliminary election where delegates or nominees are chosen
one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis	one of the main flight feathers projecting along the outer edge of a bird's wing
a seat of government	coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit
a center that is associated more than any other with some activity or product	(astronomy) a celestial body (especially a star) relative to other objects in orbit around it
wealth in the form of money or property owned by a person or business and human resources of economic value
assets available for use in the production of further assets

capital (adjective)	primary (adjective)
of principal importance	of first rank or importance or value; direct and immediate rather than secondary
first-rate	of or being the essential or basic part
uppercase	most important element
	not derived from or reducible to something else; basic