The term 'roll up' can be defined as gathering or collecting something. The four crossword solutions for this term are FURL (4 letters), GARNER (6 letters), WAD (3 letters), and AMASS (5 letters). FURL means to roll up or gather, such as a sail on a boat. GARNER means to collect or accumulate, often referring to a harvest of crops. WAD refers to a small mass of something, usually rolled up, such as a WAD of paper or money. AMASS means to gather or accumulate a large amount of something.