The term 'Protest Song Singer' can be summarized by the name Dylan, which is a five letter word. Dylan is a reference to Bob Dylan, an American singer-songwriter, artist, and writer who has been an influential figure in popular music and culture for more than five decades. He is known for his protest songs, which often address social justice issues such as civil rights, poverty, and war. His songs have been covered by numerous artists and have been featured in films, television shows, and commercials.