Donate vs. Pledge

Difference Between Donate and Pledge
Donateverb
(ambitransitive) To make a donation; to give away something of value to support or contribute towards a cause or for the benefit of another.
She donates 100 dollars to Red Crescent every year.He donated an etching from his own collection to the new art gallery.Pledgeverb
To make a solemn promise (to do something).
Donateverb
give to a charity or good cause;
I donated blood to the Red Cross for the victims of the earthquakedonate money to the orphanageShe donates to her favorite charity every monthPledgeverb
To deposit something as a security; to pawn.
Pledgeverb
(transitive) To give assurance of friendship by the act of drinking; to drink to one's health.
Pledgenoun
A solemn promise to do something.
Pledgenoun
Something given by a person who is borrowing money etc to the person he has borrowed it from, to be kept until the money etc is returned.
Pledgenoun
A person who has taken a pledge of allegiance to a college fraternity, but is not yet formally approved.
Pledgenoun
A security to guarantee payment of a debt.
Pledgenoun
A drinking toast.
Pledgenoun
}} A promise to abstain from drinking alcohol.
Pledgenoun
a deposit of personal property as security for a debt;
his saxophone was in pledgePledgenoun
someone accepted for membership but not yet fully admitted to the group
Pledgenoun
a drink in honor of or to the health of a person or event
Pledgenoun
a binding commitment to do or give or refrain from something;
an assurance of help when neededsigned a pledge never to reveal the secretPledgeverb
promise solemnly and formally;
I pledge that will honor my wifePledgeverb
pay (an amount of money) as a contribution to a charity or service, especially at regular intervals;
I pledged $10 a month to my favorite radio stationPledgeverb
propose a toast to;
Let us toast the birthday girl!Let's drink to the New YearPledgeverb
give as a guarantee;
I pledge my honorPledgeverb
bind or secure by a pledge;
I was pledged to silence