The term 'be in harmony' can be expressed in a variety of ways. The five crossword solutions for this term are 'AGREE' (5 letters), 'JIBE' (4 letters), 'MESH' (4 letters), 'sync' (4 letters), and 'CONCUR' (6 letters). All of these words refer to the idea of being in agreement or harmony with someone or something. 'AGREE' implies that two or more parties have come to an understanding, while 'JIBE' suggests that two or more ideas are compatible. 'MESH' and 'sync' both refer to the idea of two or more elements fitting together perfectly, while 'CONCUR' implies that two or more parties are in agreement. All of these words can be used to describe a situation where people or things are in harmony.