The singer of the song 'Blowin' in the Wind' is Bob Dylan, a five-letter word. Bob Dylan is an American singer-songwriter, author, and visual artist who has been an influential figure in popular music and culture for more than five decades. He is widely regarded as one of the greatest songwriters of all time and has been inducted into the Rock and Roll Hall of Fame, Nashville Songwriters Hall of Fame, and Songwriters Hall of Fame.