primary winding vs primary coil

primary winding and primary coil both are nouns.

Word	Noun	Adjective	Verb	Adverb
primary winding	Yes	No	No	No
primary coil	Yes	No	No	No

As nouns, primary winding and primary coil are synonyms defined as:

primary winding and primary coil: coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit

Other synonyms of primary winding include primary.

primary winding (noun)	primary coil (noun)
coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit	coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit