communication theory vs field

communication theory and field both are nouns.

Word	Noun	Adjective	Verb	Adverb
communication theory	Yes	No	No	No
field	Yes	No	Yes	No

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

communication theory: the discipline that studies the principles of transmitting information and the methods by which it is delivered (as print or radio or television etc.)
field: a branch of knowledge

Other hypernyms of communication theory include bailiwick, discipline, field of study, study, subject, subject area, subject field.

communication theory (noun)	field (noun)
the discipline that studies the principles of transmitting information and the methods by which it is delivered (as print or radio or television etc.)	a particular kind of commercial enterprise
	a place where planes take off and land
	a branch of knowledge
	the area that is visible (as through an optical instrument)
	(mathematics) a set of elements such that addition and multiplication are commutative and associative and multiplication is distributive over addition and there are two elements 0 and 1
	all of the horses in a particular horse race
	all the competitors in a particular contest or sporting event
	(computer science) a set of one or more adjacent characters comprising a unit of information
	a piece of land cleared of trees and usually enclosed
	somewhere (away from a studio or office or library or laboratory) where practical work is done or data is collected
	a piece of land prepared for playing a game
	a region in which active military operations are in progress
	a region where a battle is being (or has been) fought
	a geographic region (land or sea) under which something valuable is found
	extensive tract of level open land
	the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it
	a particular environment or walk of life

communication theory (verb)	field (verb)
	select (a team or individual player) for a game
	answer adequately or successfully
	play as a fielder
	catch or pick up (balls) in baseball or cricket