What word signifies harmony or agreement?

The word that signifies harmony or agreement is "concord." This term is specifically used to describe a state where there is agreement or harmony among individuals or groups. It conveys a sense of mutual understanding and collaboration, reflecting a peaceful coexistence and a unified approach.

The other words, while they may have their own meanings, do not capture the concept of harmony in the same way. For instance, "condense" refers to making something denser or more concentrated and does not relate to agreement or harmony. "Concur" means to agree with someone, but it is more focused on individual agreement rather than the broader sense of harmony within a group. "Console," on the other hand, refers to providing comfort or solace to someone in distress, which is unrelated to the idea of harmony or agreement. Thus, "concord" is the most accurate term to convey the notion of harmony or agreement in social or formal contexts.