The difference between Advise and Warn

When used as verbs, advise means to give advice to, whereas warn means to make (someone) aware of impending danger, evil, etc.

check bellow for the other definitions of Advise and Warn

Advise as a verb (transitive):

To give advice to; to offer an opinion to, as worthy or expedient to be followed.

Examples:

"The dentist advised me to brush three times a day."
Advise as a verb (transitive):

To recommend; to offer as advice.

Examples:

"The dentist advised brushing three times a day."
Advise as a verb (transitive):

To give information or notice to; to inform or counsel; — with before the thing communicated.

Examples:

"We were advised of the risk."

"The lawyer advised me to drop the case, since there was no chance of winning."
Advise as a verb (intransitive):

To consider, to deliberate.
Advise as a verb (obsolete, transitive):

To look at, watch; to see.

Warn as a verb (transitive):

To make (someone) aware of (something impending); especially: To make (someone) aware of impending danger, evil, etc. To notify or inform (someone, about something). To summon (someone) to or inform of a formal meeting or duty. To make a sound (e.g. clicking or whirring) indicating that it is about to strike or chime (an hour).

Examples:

"We waved a flag to warn the oncoming traffic about the accident."

"I phoned to warn him of the road closure."

"I warned him he'd be getting a huge box of birthday presents from me."

"The sheriff warned her to appear in court."
Warn as a verb (transitive):

To caution or admonish (someone) against unwise or unacceptable behaviour.

Examples:

"He was warned against crossing the railway tracks at night."

"Don't let me catch you running in the corridor again, I warn you."
Warn as a verb (chiefly, with "off", "away", and similar words):

To advise or order to go or stay away.

Examples:

"A sign warns trespassers off/away from the site."
Warn as a verb (intransitive):

To give warning.