agreement — An agreement is a formal decision about future action which is made by two or more countries, groups, or people.
vehement — zealous; ardent; impassioned: a vehement defense; vehement enthusiasm.
Four-or-more syllable rhymes
articles of agreement — a contract between the captain of a ship and a crew member regarding stipulations of a voyage, signed prior to and upon termination of a voyage.
collective agreement — a negotiated agreement, which is not enforceable at law, between an employer and employees' representatives, covering rates of pay or terms and conditions of employment, or both
gentlemen's agreement — an agreement that, although unenforceable at law, is binding as a matter of personal honor.