VIGILANT Synonyms: 67 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/vigilant
WebSynonyms for VIGILANT: alert, awake, watchful, careful, aware, cautious, attentive, observant; Antonyms of VIGILANT: absent, distracted, oblivious, preoccupied, asleep, unaware, dreaming, absorbed
DA: 20 PA: 55 MOZ Rank: 76