SynonymDefinitionAntonym.com - English Synonym Dictionary

Something added to complete or embellish or make perfect

Either of two parts that mutually complete each other

A word or phrase used to complete a grammatical construction

Number needed to make up a whole force

A complete number or quantity

One of a series of enzymes in the blood serum that are part of the immune response

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