Synonyms for watchful

Similarity of adj watchful

2 senses of watchful

Sense 1:

alert (vs. unalert), watchful
argus-eyed, open-eyed, vigilant, wakefulflyheads-up, wide-awakelidless, sleepless

Also See: awake#1; lively#1; wary#1

Sense 2:

insomniac, sleepless, watchful
awake(predicate) (vs. asleep)