Yes, "nonviolent" is an adjective.
Nonviolent is an adjective.
Nonviolent resistance (apex)
Nonviolent Peaceforce was created in 2002.
The protesters marched in a nonviolent manner, carrying signs and chanting peacefully to advocate for change.
Nonviolent Student Nonviolent Coordinating Committee
My mum told my brother and I to be more nonviolent otherwise we won't get our payment.
Committee for Nonviolent Revolution was created in 1946.
Nonviolent Soldier of Islam was created in 1984.
The ISBN of Nonviolent Soldier of Islam is 1888314001.
Nonviolent Student Nonviolent Coordinating Committee
Nonviolent Soldier of Islam has 274 pages.