All extracurricular synonyms

adjective extracurricular

• additional — Additional things are extra things apart from the ones already present.
• supplementary — Also, supplemental. of the nature of or forming a supplement; additional.
• optional — left to one's choice; not required or mandatory: Formal dress is optional.
• secondary — next after the first in order, place, time, etc.
• subsidiary — serving to assist or supplement; auxiliary; supplementary.
• clandestine — Something that is clandestine is hidden or kept secret, often because it is illegal.
• illicit — not legally permitted or authorized; unlicensed; unlawful.
• improper — not proper; not strictly belonging, applicable, correct, etc.; erroneous: He drew improper conclusions from the scant evidence.
• adulterous — An adulterous relationship is a sexual relationship between a married person and someone they are not married to. An adulterous person is someone who commits adultery.
• unfaithful — not faithful; false to duty, obligation, or promises; faithless; disloyal.
• cheating — an instance of rule-breaking
• immoral — violating moral principles; not conforming to the patterns of conduct usually accepted or established as consistent with principles of personal and social ethics.
• moonlighting — the light of the moon.
• speedy — characterized by speed; rapid; swift; fast.
• two-faced — having two faces.
• two-timing — to be unfaithful to (a lover or spouse).
• unchaste — not chaste; not virtuous; not pure: an unchaste woman.