The term 'lay up' is a phrase used to describe the act of saving or storing something for future use. The crossword solutions for this term are 'STOW' (4 letters), 'AMASS' (5 letters), 'layby' (5 letters), 'STORE' (5 letters), 'rollup' (6 letters), and 'storeup' (7 letters). All of these words refer to the act of collecting and preserving something for later use. STOW, AMASS, and STORE all mean to collect and save something, while layby and rollup refer to the act of putting something away in a safe place. Storeup is a combination of the two words, meaning to STORE something up for later use.