The term 'fall off' can be used to describe a decrease or DECLINE in something. The crossword solutions for this term include FLAG (4 letters), REGRESS (7 letters), DROP (4 letters), DECLINE (7 letters), DECAY (5 letters), DIP (3 letters), EBB (3 letters), FADE (4 letters), WANE (4 letters), ABATE (5 letters), ERODE (5 letters), TAPER (5 letters), easeup (6 letters), RETURN (6 letters), SLITHER (7 letters), and TOBOGGAN (8 letters). These words all describe a gradual decrease in something, such as a FLAG flying in the wind, a regression in progress, a DROP in temperature, a DECLINE in popularity, a DECAY in quality, a DIP in the road, an EBB in the tide, a fading of color, a waning of light, an abatement of noise, an erosion of soil, a tapering of a shape, an easing up of pressure, a RETURN to a previous state, a slithering of a snake, or a tobogganing down a hill.