The phrase "second fiddles" refers to individuals who hold a subordinate position or are seen as less important than someone else. There are several synonyms for this term that can be used depending on the context of the situation. These terms include "second string," "runner-up," "supporting cast," "backup," "subordinate," and "sidekick." Each of these words denotes a level of inferiority or subordination to someone else, which can be applicable in various settings such as sports, politics, or the workplace. The use of these terms can help clarify the role or position of a person in a situation and highlight their level of authority or influence.