Synonyms for pledge

noun

• a drink in honor of or to the health of a person or event
• a binding commitment to do or give or refrain from something
• a deposit of personal property as security for a debt
• someone accepted for membership but not yet fully admitted to the group

verb

• propose a toast to
• promise solemnly and formally
• pay (an amount of money) as a contribution to a charity or service, especially at regular intervals
• bind or secure by a pledge
• give as a guarantee