field magnet vs magnet

field magnet and magnet both are nouns.

Word	Noun	Adjective	Verb	Adverb
field magnet	Yes	No	No	No
magnet	Yes	No	No	No

As nouns, magnet is a hypernym of field magnet; that is, magnet is a word with a broader meaning than field magnet:

field magnet: a magnet that provides a magnetic field in a dynamo or electric motor
magnet: (physics) a device that attracts iron and produces a magnetic field

field magnet (noun)	magnet (noun)
a magnet that provides a magnetic field in a dynamo or electric motor	(physics) a device that attracts iron and produces a magnetic field
	a characteristic that provides pleasure and attracts