synonymous

/sɪˈnɑnəməs/
adjective
  1. (of words or phrases) Having the same or nearly the same meaning.
    • In this thesaurus, 'quick' and 'rapid' are listed as synonymous.
    • 'Big' and 'large' are synonymous in most contexts.
    • The teacher explained that 'happy' and 'joyful' are not always perfectly synonymous.
  2. Closely associated with or strongly suggestive of something; often used figuratively.
    • For many people, summer is synonymous with vacation and relaxation.
    • His name became synonymous with excellence in the field of science.
    • The brand is synonymous with quality and durability.