Assumpsit is a legal term that refers to a type of contract or agreement where one party has made an assumption or promise, usually in exchange for some type of payment or consideration. Synonyms for assumpsit include contract, agreement, pact, promise, undertaking, commitment, engagement, covenant, and bargain. These words all imply some type of mutual understanding or obligation between parties. It is important to use precise legal language when drafting contracts or agreements, and knowing synonyms for terms like assumpsit can help ensure that the language used is clear and concise.