The term 'MEASURE UP' can be broken down into six crossword solutions: EQUAL (5 letters), RATE (4 letters), COMPARE (7 letters), STACK (5 letters), PASSMUSTER (10 letters), and TOETHELINE (10 letters). These words all have to do with measuring something up against a standard or another object. To be EQUAL means to be the same as something else, while to RATE something is to assign it a numerical value. Comparing two things means to look at them side by side and note the differences, while stacking is the act of putting one thing on top of another. Passmuster and toethelines are both terms used to describe a process of inspection, where something is measured up against a set of standards.