Synonyms for Vigilant

Synonyms starting with letter R

• ready

  prepared
• regardful
• reasonable
• rapt

  alert
• rapid
• roused
• rigorous
• religious
• rigid
• responsive
• recognizing
• remarking
• reserved
• restrained
• reticent
• respectful
• raring
• resentful
• rival
• restrictive
• recognising
• restless
• restive
• rational
• regarding