100 Best Synonyms for “Promise”

No.	Term	Definition
1.	Act of faith	Commitment despite uncertainty.
2.	Affidavit	Sworn written statement.
3.	Agreement	Mutual understanding to do something.
4.	Assent	Expression of approval or consent.
5.	Assurance	Confident statement of intent.
6.	Attestation	Formal confirmation as true.
7.	Avowal	Open declaration of intent.
8.	Bargain	Deal involving mutual commitments.
9.	Blood oath	Oath sealed with symbolic blood.
10.	Bond	Binding pledge, often financial.
11.	Bottom line	Final commitment; nonnegotiable term.
12.	Carve-out clause	Agreed exception in a contract.
13.	Code of conduct	Rules one commits to follow.
14.	Commitment	Firm decision to carry through.
15.	Compact	Formal agreement between parties.
16.	Consent	Permission indicating agreement.
17.	Contract	Legally enforceable agreement.
18.	Covenant	Solemn binding agreement.
19.	Deal	Agreement to exchange or act.
20.	Declaration	Formal statement of intent.
21.	Dedication	Steadfast devotion to a cause.
22.	Deed	An action fulfilling a pledge.
23.	Earnest money	Deposit showing intent to buy.
24.	Engagement	Obligation or appointment undertaken.
25.	Entreaty	Earnest request seeking assurance.
26.	Escrow	Conditional holding pending fulfillment.
27.	Faith	Trustworthiness; fidelity to word.
28.	Faith pledge	Commitment grounded in trust.
29.	Fidelity	Loyal adherence to duty or word.
30.	Gentleman’s agreement	Unwritten agreement based on honor.
31.	Good-faith pledge	Sincere commitment without deceit.
32.	Guarantee	Assurance something will be done.
33.	Guarantee bond	Bond ensuring performance.
34.	Guarantee letter	Written guarantee of performance.
35.	Handclasp	Agreement sealed by handshake.
36.	Handshake deal	Informal agreement by handshake.
37.	Honor	Integrity in keeping one’s word.
38.	Indenture	Formal legal agreement document.
39.	Insurance	Financial guarantee against loss.
40.	Intent	Purpose to act as stated.
41.	IOU	Written acknowledgment of debt owed.
42.	Joint resolution	Formal shared decision or pledge.
43.	Kiss-and-make-up pact	Reconciliation agreement after conflict.
44.	Lease	Contract granting temporary use.
45.	Letter of intent	Document stating planned agreement.
46.	Letter of undertaking	Written commitment to perform.
47.	Liege homage	Feudal oath of allegiance.
48.	Mandate	Authoritative instruction to act.
49.	Marriage vow	Spoken commitment in marriage.
50.	Memorandum of agreement	Written record of an agreement.
51.	Memorandum of understanding	Nonbinding outline of agreement.
52.	Moral obligation	Duty felt by conscience.
53.	Noncompete	Agreement not to compete.
54.	Note	Written acknowledgment of debt.
55.	Note of hand	Signed promise to pay.
56.	Oath	Solemn sworn pledge.
57.	Oath of office	Sworn pledge for a role.
58.	Obligation	Duty to do what’s required.
59.	Offer	Proposal expressing willingness to act.
60.	Pact	Formal agreement or treaty.
61.	Parole	Conditional release based on pledge.
62.	Performance bond	Bond ensuring contract completion.
63.	Personal guarantee	Individual’s backing of a debt.
64.	Pledge	Serious commitment to do something.
65.	Policy	Stated commitment guiding decisions.
66.	Power of attorney	Legal authorization to act.
67.	Proclamation	Public official announcement.
68.	Profession	Public declaration of belief or intent.
69.	Proffer	Offer or proposal to do.
70.	Proviso	Clause limiting an agreement.
71.	Quid pro quo	Something given for something promised.
72.	Ratification	Formal approval making it binding.
73.	Reassurance	Statement easing doubt; assurance.
74.	Resolution	Firm decision to act.
75.	Safe-conduct	Guarantee of safe passage.
76.	Seal	Mark signifying binding approval.
77.	Security	Collateral guaranteeing a duty.
78.	Settlement	Agreement resolving a dispute.
79.	Show of good faith	Act demonstrating sincere intent.
80.	Signature	Written sign of agreement.
81.	Solemn assurance	Serious statement meant to be trusted.
82.	Solemn vow	Grave, formal pledge.
83.	Statement of intent	Declared plan to act.
84.	Stipulation	Condition required in an agreement.
85.	Surety	Person guaranteeing another’s duty.
86.	Surety bond	Bond guaranteeing performance.
87.	Term sheet	Summary of agreed deal terms.
88.	Testimony	Sworn statement offered as truth.
89.	Title bond	Bond guaranteeing clear title.
90.	Treaty	Formal agreement between states.
91.	Troth	Faithful commitment; pledged word.
92.	Trust	Reliance on someone’s word.
93.	Understanding	Informal agreement or arrangement.
94.	Undertaking	A task or promise to perform.
95.	Verbal agreement	Spoken agreement between parties.
96.	Vote of confidence	Formal backing indicating support.
97.	Vow	Solemn promise or pledge.
98.	Warranty	Written guarantee of quality.
99.	Word	One’s assurance; pledged statement.
100.	Written assurance	Documented statement of intent.