diligent vs. vigilant

diligent

adjective

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

    a diligent student.

    Synonyms: sedulous, assiduous, industrious

  2. done or pursued with persevering attention; painstaking.

    a diligent search of the files.

    Synonyms: unremitting, tireless, indefatigable

vigilant

adjective

  1. keenly watchful to detect danger; wary.

    a vigilant sentry.

    Antonyms: careless

  2. ever awake and alert; sleeplessly watchful.

    Synonyms: sleepless, wide-awake