Thinking back is a way to REMEMBER past events or experiences. The term 'think back' can be broken down into four different crossword solutions: REMEMBER (8 letters), RECALL (6 letters), REMINISCE (9 letters), and RECOLLECT (9 letters). Remembering is the act of bringing something to mind, while recalling is the act of calling something to mind. Reminiscing is the act of thinking fondly about past experiences, and recollecting is the act of gathering memories together.