Collocations for violent - adj.

be
become, get, grow, turn
She started to get violent.

extremely, fairly, very, etc.
exceptionally, incredibly, particularly
increasingly
gratuitously
The movie is contrived, sentimental and gratuitously violent.

potentially
Employees are trained to deal with potentially violent incidents.

inherently
the question of whether humans are inherently violent

physically, sexually
graphically
a range of graphically violent video games

to, towards/toward
He was violent towards/toward his wife on several occasions.

be
become

extremely, fairly, very, etc.
exceptionally
an exceptionally violent storm

almost
He felt a strong, almost violent, dislike for the stranger.

Violent is used with these nouns:
act, action, argument, assault, attack, behaviour, blow, character, clash, collision, conduct, conflict, confrontation, conquest, convulsion, cough, crackdown, crime, criminal, death, demonstration, dislike, disorder, disturbance, emotion, encounter, end, eruption, explosion, fantasy, father, felon, felony, film, gang, hatred, husband, image, imagery, impulse, incident, jerk, jolt, lurch, man, mob, movie, murder, offence, offender, opposition, outburst, overthrow, passion, play, protest, quarrel, rage, rape, reaction, rebellion, repression, reprisal, resistance, retaliation, retribution, revolution, riot, row, scene, shake, shove, shudder, spasm, storm, streak, struggle, suppression, swing, tactic, temper, temperament, tendency, threat, thug, tremor, unrest, upheaval, uprising, urge, weather