back vs field general

back and field general both are nouns.

Word	Noun	Adjective	Verb	Adverb
back	Yes	Yes	Yes	Yes
field general	Yes	No	No	No

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

back: (American football) the position of a player on a football team who is stationed behind the line of scrimmage
field general: (American football) the position of the football player in the backfield who directs the offensive play of his team

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

Other hyponyms of back include flanker, flanker back, quarterback, signal caller, running back, tailback, wingback.

back (noun)	field general (noun)
(American football) the position of a player on a football team who is stationed behind the line of scrimmage	(American football) the position of the football player in the backfield who directs the offensive play of his team
the side that goes last or is not normally seen	(football) the person who plays quarterback
a support that you can lean against while sitting
the part of a garment that covers the back of your body
the protective covering on the front, back, and spine of a book
the posterior part of a human (or animal) body from the neck to the end of the spine
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
the part of something that is furthest from the normal viewer
(football) a person who plays in the backfield

back (adjective)	field general (adjective)
related to or located at the back
of an earlier date
located at or near the back of an animal

back (verb)	field general (verb)
establish as valid or genuine
strengthen by providing with a back or backing
shift to a counterclockwise direction
place a bet on
travel backward
cause to travel backward
support financial backing for
be behind; approve of
give support or one's approval to
be in back of

back (adverb)	field general (adverb)
at or to or toward the back or rear
in or to or toward a past time
in repayment or retaliation
in or to or toward a former location
in or to or toward an original condition
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