controversy (n.)

• altercation
• antagonism
• apologetics
• apologia
• apology
• argument
• argumentation
• bicker
• bickering
• brawl
• broil
• casuistry
• combat
• conflict
• confrontation
• contention
• contentiousness
• contest
• contestation
• contradiction
• debate
• defense
• difference
• disagreement
• discord
• discordance
• discrepancy
• disharmony
• disparity
• disputation
• dispute
• dissension
• dissent
• dissidence
• dissonance
• disunion
• disunity
• divergence
• diversity
• embroilment
• enmity
• faction
• feud
• fight
• fighting
• fracas
• fuss
• hassle
• hostility
• hubbub
• hurrah
• imbroglio
• inequality
• litigation
• logomachy
• miff
• negation
• opposition
• polemic
• polemics
• quarrel
• quarrelsomeness
• questioning
• repugnance
• rhubarb
• rumpus
• set-to
• snarl
• spat
• squabble
• strife
• struggle
• tiff
• tussle
• variance
• vendetta
• war
• warfare
• words
• wrangle
• wrangling