* Joy - a feeling of great pleasure and happiness.
* Justice - fairness, righteousness, and moral rightness.
* Judgment - the ability to make considered decisions or come to sensible conclusions.
* Jealousy - a feeling of resentment towards someone because of their success, possessions, or advantages.
* Journey - a long trip, especially by car or by foot.
* Juxtaposition - the fact of two things being seen or placed close together with contrasting effect.
* Jingoism - extreme patriotism, especially in the form of aggressive or warlike foreign policy.
* Jubilee - a period of celebration or rejoicing, especially one marking a special anniversary.
* Jargon - special words or expressions used by a particular profession or group.
* Jettison - the act of throwing something overboard, especially to lighten a ship's load.
Let me know if you'd like to explore more abstract nouns starting with "J" in a specific context!