action
anger
battered
battle
beaten
birds
bitter
brutal
catch
catching
clash
collision
combat
competition
conflict
contention
contradiction
contrary
contrast
cruel
crying
duel
feeder
fierce
fight
fighting
game
holding
impact
interspecific
inverse
match
montanus
opposite
opposition
passer
rage
rivalry
rush
ruthless
severe
sparrow
sparrows
stare
struggle
tree
tug
wild
wings
wrath