[1] : The Collaborative International Dictionary of English v.0.48

warfare \war"fare`\, v. i.
   to lead a military life; to carry on continual wars.
   --camden.
   1913 webster

[2] : The Collaborative International Dictionary of English v.0.48

warfare \war"fare`\, n. war + oe. fare a journey, a passage,
   course, as. faru. see fare, n.
   1913 webster
   1. military service; military life; contest carried on by
      enemies; hostilities; war.
      1913 webster

            the philistines gathered their armies together for
            warfare, to fight with israel.        --i sam.
                                                  xxviii. 1.
      1913 webster

            this day from battle rest;
            faithful hath been your warfare.      --milton.
      1913 webster

   2. contest; struggle.
      1913 webster

            the weapons of our warfare are not carnal. --2 cor.
                                                  x. 4.
      1913 webster
see also:
fare 

[3] : WordNet (r) 2.0

warfare
     n 1: the waging of armed conflict against an enemy; "thousands of
          people were killed in the war" syn: war
     2: an active struggle between competing entities; "a price
        war"; "a war of wits"; "diplomatic warfare" syn: war
see also:
war 

[4] : Moby Thesaurus II by Grady Ward, 1.0

39 moby thesaurus words for "warfare":
   kilkenny cats, altercation, argument, bickering, cat-and-dog life,
   combat, competition, conflict, contention, contentiousness,
   contest, contestation, controversy, cut and thrust, debate,
   disputation, dispute, emulation, enmity, fighting, hostility,
   litigation, logomachy, paper war, polemic, quarrel, quarreling,
   quarrelsomeness, rivalry, scrapping, squabbling, strife, striving,
   struggle, tug-of-war, war, war of words, words, wrangling

Warfare >> W Words
Warfare, definition of term: Warfare
warfare_pag1.html

Germ Warfare >> G Words
Germ Warfare, definition of term: Germ Warfare
germ+warfare_pag1.html