protest singer

• folkRegular common people
• activistVigorous cause champion
• anthemOfficial song of praise
• acousticRelating to sound
• guitarFretted stringed instrument

rally · movement · picket · solidarity · conscience · troubadour · ballad · march · justice · defiant · union · topical · freedom · resistance · microphone · crowd · chant · cause

• folk musiciansfolk singer, folk guitarist, folk duo, folk trio, fiddler
• folk singersfolk singer, singer-songwriter, troubadour, bard
• Nonconformistsnonconformist, rebels, rebel, misfits, misfit
• acoustic musiciansfolk singer, guitarist, singer-songwriter, acoustic duo, folk artist