The phrase "common mood" refers to a state of mind or feeling that is shared by many people. Synonyms for this phrase include "collective mood," "popular mood," and "public state of mind." These terms all refer to a shared emotional or mental state that is prevalent among a group of people. Other possible synonyms could include "universal mood," "widespread feeling," and "general attitude." Regardless of the specific phrase used, the concept of a common mood is an important one, as it can have a significant impact on how individuals and groups interact with one another. Understanding the collective mood can therefore be crucial for effective communication and decision-making.