technology vs subject field

technology and subject field both are nouns.

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

As nouns, subject field is a hypernym of technology; that is, subject field 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
subject field: a branch of knowledge

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

technology (noun)	subject field (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