force field vs field of force

force field and field of force both are nouns.

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

As nouns, force field and field of force are synonyms defined as:

force field and 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

Other synonyms of force field include field.

force field (noun)	field of force (noun)
the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it	the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it