numerology vs subject field

numerology and subject field both are nouns.

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

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

numerology: the study of the supposed occult influence of numbers on human affairs
subject field: a branch of knowledge

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

numerology (noun)	subject field (noun)
the study of the supposed occult influence of numbers on human affairs	a branch of knowledge