The term 'match up' can be defined as the act of pairing two or more things together, making them CORRESPOND to each other. The crossword solutions for this term include PAIR (4 letters), JIBE (4 letters), SYNCH (5 letters), CORRESPOND (10 letters), SYNC (4 letters), AGREE (5 letters), and LIT (3 letters). Each of these words has a slightly different meaning, but all of them refer to the idea of matching two or more things together. PAIR refers to two things that are joined together, JIBE means to be in harmony with something, SYNCH is an abbreviation of synchronize, CORRESPOND means to have a similar relationship, SYNC is another abbreviation of synchronize, AGREE means to be in agreement, and LIT is an abbreviation of the word 'ALIGHT'. All of these words refer to the concept of matching up two or more things, either in terms of their relationship or in terms of their compatibility.