Breakoff
ahd-5
noun.
The act or an instance of breaking off; discontinuance.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
discontinuance
(act of breaking off)
Word Usage
"'breakoff' of relations with Israel by Chavez accompanied by a hearty Bronx cheer from Iran's Supreme Ruler, Ayatollah Khamenei."
suggests
breakout