futuristics vs subject area

futuristics and subject area both are nouns.

Word	Noun	Adjective	Verb	Adverb
futuristics	Yes	No	No	No
subject area	Yes	No	No	No

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

futuristics: the study or prediction of future developments on the basis of existing conditions
subject area: a branch of knowledge

Other hypernyms of futuristics include bailiwick, discipline, field, field of study, study, subject, subject field.

futuristics (noun)	subject area (noun)
the study or prediction of future developments on the basis of existing conditions	a branch of knowledge