field of force vs force field

field of force and force field both are nouns.

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

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

field of force and force field: 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 field of force include field.

field of force (noun)	force field (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