engineering vs field of study

engineering and field of study both are nouns.

Word	Noun	Adjective	Verb	Adverb
engineering	Yes	No	No	No
field of study	Yes	No	No	No

As nouns, field of study is a hypernym of engineering; that is, field of study 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
field of study: a branch of knowledge

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

engineering (noun)	field of study (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