What is the synonym of 'Dissolution'?

Dissolution (noun):
Bangla Meaning: দ্রবণ; (সংগঠনাদির/বৈবাহিক) অবসান; (বিশেষত নির্বাচনের আগে) পার্লামেন্টের অবলুপ্তি।
English Meaning: The ending of especially an official organization or a legal arrangement.
Synonyms: Split-up, Disbanding, Separation, Break up, Partition.
Antonyms: Asceticism, Restraint, Union, Commencement, Combination.

Example Sentence: 
1. The treatment is used for the dissolution of kidney stones.
2. The dissolution of the Soviet Union happened just before the 1992 Winter Olympics.

Source: Website Lecture.