diligent vs. vigilant

diligent

adjective

  1. constant in effort to accomplish something; attentive and persistent in doing anything:

    a diligent student.

    Synonyms: , ,

  2. done or pursued with persevering attention; painstaking:

    a diligent search of the files.

    Synonyms: , ,

vigilant

adjective

  1. keenly watchful to detect danger; wary:

    a vigilant sentry.

    Antonyms:

  2. ever awake and alert; sleeplessly watchful.

    Synonyms: ,