A – agro, aggression, altercation, arguments, argy bargy, antagonism
B – bickering, brannigan
C – confrontation, contention, controversy, chaffer, contest, combat
D – dispute, disagreement, debate, duel, disorders
E – enmity, embroglio
F – friction, falling-out, fight, free-for-all, feud
G – grievance
H – hostility, hassle, hair-splitting
I – infighting, insurrection, imbroglio
J – jarring
K – kerfuffle
L – litigation, logic chopping, labor dispute
M – mutiny, misunderstanding, monomachy
N – niff-naw
O – opposition, opponency
P – polemic, pother
Q – quarrel
R – rebellion, riot, revolt
S – scandal, static, skirmish
T – tangle, tiff, tongue-fence
U – up-and-a-downer
V – verbal confrontation, violent upheaval
W – wrangle, war of words, wigs on the green
X – xenophobia, X-treme
Y – yammer
Z – zealot, zealotry