warfare (n.)

• altercation
• argument
• bickering
• combat
• competition
• conflict
• contention
• contentiousness
• contest
• contestation
• controversy
• debate
• disputation
• dispute
• emulation
• enmity
• fighting
• hostility
• litigation
• logomachy
• polemic
• quarrel
• quarrelsomeness
• rivalry
• strife
• striving
• struggle
• tug-of-war
• war
• words
• wrangling