Synonyms for primary

noun

• a preliminary election where delegates or nominees are chosen
• 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

adjective

• of or being the essential or basic part
• most important element
• not derived from or reducible to something else; basic
• of first rank or importance or value; direct and immediate rather than secondary