technology vs field of study

technology and field of study both are nouns.

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

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

technology: 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 technology include bailiwick, discipline, field, study, subject, subject area, subject field.

technology (noun)	field of study (noun)
the application of the knowledge and usage of tools (such as machines or utensils) and techniques to control one's environment	a branch of knowledge
machinery and equipment developed from engineering or other applied sciences
the discipline dealing with the art or science of applying scientific knowledge to practical problems