comity

Definitions:

Courtesy; civility; in international law, acts of courtesy between nations and states.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)
Courteousness: civility.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
Courtesy; civility.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (noun) (n.) (noun)
Civility; politeness; courtesy between nations.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)

Usage examples:

Above the din of battle I heard a voice emerging from Geordie's head, which head emerged from his opponent's oxter- " Dinna mark me, Jock, dinna mark me; for we're gaun to hae the bairn baptized i' the kirk the morn," and I knew not which to admire more, Geordie's moral versatility, or the beautiful comity of war.
- St. Cuthbert's by Robert E. Knowles
But it is further the abandonment of all principle, the acceptance of the doctrine that everything is allowable- lying, treachery, calumny, and bad faith- in order to achieve its end, that has placed Germany outside the comity of nations.
- Secret Societies And Subversive Movements by Nesta H. Webster
Some legislation appears to be called for as well by our own interest as by comity to the adjoining British provinces.
- Complete State of the Union Addresses from 1790 to the Present by Various