engineering vs subject field

engineering and subject field both are nouns.

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

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

engineering: the discipline dealing with the art or science of applying scientific knowledge to practical problems
subject field: a branch of knowledge

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

engineering (noun)	subject field (noun)
the practical application of technical and scientific knowledge to commerce or industry	a branch of knowledge
a room (as on a ship) in which the engine is located
the discipline dealing with the art or science of applying scientific knowledge to practical problems