The term 'CAME BACK' can be expressed in four different ways, each with a different number of letters. The first is 'RETURNED', which has 8 letters and means to go back to a place or situation after being away. The second is 'ECHOED', which has 6 letters and means to repeat something that was said or done. The third is 'RALLIED', which has 7 letters and means to come together in support of a cause or idea. Finally, the fourth is 'RETORTED', which has 8 letters and means to respond to something with a sharp or witty remark.