The term 'complement' can refer to a variety of different things. In this crossword, it is represented by nine different words: PENDANT (7 letters), COUNTERPART (11 letters), CORRELATE (9 letters), CREW (4 letters), ACCOMPANIMENT (13 letters), UNIT (4 letters), MATCH (5 letters), COMPLETE (8 letters), and AUGMENTATION (12 letters). A PENDANT is an ornament that hangs from a necklace or other jewelry. A COUNTERPART is someone or something that has similar characteristics to another person or thing. CORRELATE means to be associated with or connected to something else. A CREW is a group of people working together on a task. An ACCOMPANIMENT is something that goes along with something else. A UNIT is a single thing or person that is part of a larger group. To MATCH is to be equal or similar to something else. To COMPLETE is to finish something. AUGMENTATION is the act of increasing or making something bigger. An ADDITION is something that is added to something else. All of these words can be used to describe the concept of complementing something else.