field of force vs flux

field of force and flux both are nouns.

Word	Noun	Adjective	Verb	Adverb
field of force	Yes	No	No	No
flux	Yes	No	Yes	No

As nouns, flux is a hyponym of field of force; that is, flux is a word with a more specific, narrower meaning than field of force:

field of force: the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it
flux: the lines of force surrounding a permanent magnet or a moving charged particle

Other hyponyms of field of force include electric field, gravitational field, magnetic field, magnetic flux, radiation field.

field of force (noun)	flux (noun)
the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it	in constant change
	(physics) the number of changes in energy flow across a given surface per unit area
	a flow or discharge
	the lines of force surrounding a permanent magnet or a moving charged particle
	excessive discharge of liquid from a cavity or organ (as in watery diarrhea)
	a state of uncertainty about what should be done (usually following some important event) preceding the establishment of a new direction of action
	a substance added to molten metals to bond with impurities that can then be readily removed
	the rate of flow of energy or particles across a given surface

field of force (verb)	flux (verb)
	mix together different elements
	become liquid or fluid when heated
	move or progress freely as if in a stream