upboilingn.
Etymology: Previous versions of the OED give the stress as: upˈboiling.
the mind > emotion > anger > [noun] > boiling up of anger
1794 S. T. Coleridge i. 88 He feels The dire upboilings of the storm within him.
This entry has not yet been fully updated (first published 1926; most recently modified version published online June 2019).