Synonyms for complement

noun

• something added to complete or embellish or make perfect
• number needed to make up a whole force
• a complete number or quantity
• a word or phrase used to complete a grammatical construction
• either of two parts that mutually complete each other
• one of a series of enzymes in the blood serum that are part of the immune response

verb

• make complete or perfect; supply what is wanting or form the complement to