Difference between Watchful and Alert

WATCHFUL vs ALERT: NOUN

A notification of higher importance than an advisory.
An alarm.
On the lookout or watch against attack or danger; ready to act.
An alarm from a real or threatened attack; a sudden attack; also, a bugle sound to give warning.
Condition of heightened watchfulness or preparation for action
An automatic signal (usually a sound) warning of danger
An attitude of vigilance; watch; guard: especially in the phrase on or upon the alert, upon the watch; on the lookout; guarding against surprise or danger: as, “the readiness of one on the alert,” Dickens.
A signal that warns of attack or danger.
A warning serves to make you more alert to danger

Experiencing or accompanied by sleeplessness
Engaged in or accustomed to close observation
Observant, vigilant and aware
Full of watch; vigilant; attentive; careful to observe closely; observant; cautious; -- with of before the thing to be regulated or guarded; ; and with against before the thing to be avoided.
Not sleeping; awake.
Closely observant or alert; vigilant: : careful.
Carefully observant or attentive; on the lookout for possible danger

Wakeful; sleepless.
Vigilant; careful; wary; cautious; observant; alert; on the watch: with of before the thing to be regulated or observed, and against before the thing to be avoided: as, to be watchful of one's behavior; to be watchful against the growth of vicious habits.
Synonyms Watchful, Vigilant, Wakeful, attentive, heedful, circumspect, guarded. Wakeful refers to the lack of disposition to sleep, especially at times when one would ordinarily have such a disposition; watchful and vigilant refer to the mind, will, or conduct: they are of about equal vigor; watchful is the broader in its range of meaning.

Active in vigilance; watchful; vigilantly attentive.
Moving with celerity; brisk; active; nimble: as, “an alert young fellow,” Addison, Spectator, No. 403.
Lively, agile, quick, prompt, ready, spry.
(idiom) (on the alert) Watchful and prepared for danger, emergency, or opportunity.

Vigilance, Careful, Observant, Cautious, Mindful, Wary, Attentive, Open eyed, Argus eyed, Insomniac, Sleepless, Wakeful, Awake, Alert, Vigilant

Fly, Lidless, Perched, Intelligent, Perked, Alive, Qui vive, Sleepless, Wakeful, Conscious, Aware, Awake, Watchful, Vigilant, Alarm

Vigilance, Careful, Observant, Cautious, Mindful, Wary, Attentive, Open eyed, Argus eyed, Insomniac, Sleepless, Wakeful, Awake, Alert, Vigilant

Fly, Lidless, Perched, Intelligent, Perked, Alive, Qui vive, Sleepless, Wakeful, Conscious, Aware, Awake, Watchful, Vigilant, Alarm

Be watchful for suspicious characters around your neighborhood mailboxes.
Watchful waiting with periodic assessment through telemedicine was done.
If anything, he was foreboding, silent and watchful.
Your watchful spirit is more capable than normal.
Be watchful for signs of heat or smoke.
Spy Drones: Your Watchful Eye in The Sky!
Stay mentally alert and be watchful of yourself.
All floated watchful as pikes in a hike.
Keeping your emails outside of watchful eyes is indeed a justification, but only if keeping those emails outside of watchful eyes makes dollars sense.
Remain watchful: Even if everything proceeds smoothly and as planned, remain watchful and expect the unexpected.

Yahoo, but apparently that only turns off the notification icon and alert but not the new email alert tone.
Sounds for options such as ringtones and alert tones, vibration settings and patterns, and ringer and alert volumes.
The alert component template contains the html for displaying alert messages at the top of the page.
This alert interval overrides the WEF alert interval.
Dream about medical alert form cvs medical guardians medical alert sent to your order?
Using an alert, you are able to inform users about impossibilities, invalid input or anything else that requires an alert.
Be alert and brief your aircrew to be alert.
We have a Citizen Emergency Alert service that allows your county to alert you.
To open a Benefit Alert, click the View Alert link.
CPSC issues alert about care of room humidifiers: Safety alert.