Consentaneousness is a term that refers to the state of being in agreement. It is often used in legal and ethical contexts to describe the mutual agreement between parties. Some synonyms that may be used in place of consentaneousness include concurrence, unanimity, accord, harmony, conformity, and consensus. These terms all imply a sense of unity and agreement between parties, whether it be individuals, groups, or organizations. Additionally, words such as concord, compliance, and cooperation are also considered synonyms for consentaneousness, as they suggest a willingness to work together towards a common goal. In summary, there are many words that can be used as a substitute for consentaneousness, each with their own nuances and connotations.