Long-suffering, n.
Long patience of offense. Despisest thou the riches of his goodness and forbearance and long- suffering Rom. ii. 4.
1 other Webster entry under this spelling
Long-suffering, n.
Bearing injuries or provocation for a long time; patient; not easily provoked. The Lord God, merciful and gracious, long-suffering, and abundant in goodness and truth. Ex. xxxiv. 6.
Shades of meaning
Fernald has no entry of its own for long-suffering; he lists it under patience.
Where he writes about it:
As regards our relations to our fellow men, forbearance is abstaining from retaliation or revenge; patience is keeping kindliness of heart under vexatious conduct; long-suffering is continued patience. — from patience