subject field vs bailiwick

subject field and bailiwick both are nouns.

Word	Noun	Adjective	Verb	Adverb
subject field	Yes	No	No	No
bailiwick	Yes	No	No	No

As nouns, subject field and bailiwick are synonyms defined as:

Other synonyms of subject field include discipline, field, field of study, study, subject, subject area.

subject field (noun)	bailiwick (noun)
a branch of knowledge	a branch of knowledge
	the area over which a bailiff has jurisdiction