Vigilant vs. Watchful — What's the Difference?

On the alert, as for danger or error; watchful.

Watchful (1997) is an album by the American experimental pop music group Amoeba. This is the first Amoeba album to feature the classic lineup of Robert Rich and Rick Davies.

Watchful, especially for danger or disorder; alert; wary

Closely observant or alert; vigilant

Attentive to discover and avoid danger, or to provide for safety; wakeful; watchful; circumspect; wary.

(Archaic) Not sleeping; awake.

Carefully observant or attentive; on the lookout for possible danger;

Fully observant, vigilant, or aware.

Full of watch; vigilant; attentive; careful to observe closely; observant; cautious; - with of before the thing to be regulated or guarded; as, to be watchful of one's behavior; and with against before the thing to be avoided; as, to be watchful against the growth of vicious habits.

Carefully observant or attentive; on the lookout for possible danger;

Experiencing or accompanied by sleeplessness;