subject matter vs parenthesis

Other hyponyms of subject matter include body, corker, reminder, petition, postulation, request, memorial, latent content, subject, theme, topic, aside, digression, divagation, excursus, import, meaning, significance, signification, bunk, hokum, meaninglessness, nonsense, nonsensicality, drivel, garbage, acknowledgement, acknowledgment, refusal, info, information, counsel, counseling, counselling, direction, guidance, commitment, dedication, approval, commendation, disapproval, respects, discourtesy, disrespect, insertion, interpolation, statement, statement, humor, humour, wit, witticism, wittiness, opinion, view, direction, instruction, proposal, offer, offering, entry, submission, narration, narrative, story, tale, packaging, promo, promotion, promotional material, publicity, sensationalism, shocker.