Local union is a term used to refer to a group of workers who come together to form an organization aimed at improving their working conditions, wages, and benefits. However, there are several other synonymous terms that can refer to the same concept or idea. One of the most common synonyms for local union is labor union, a term that is used to refer to an organization that represents the interests of the workers in a particular industry. Others include trade union, guild, and workers' association. Employers often negotiate with local unions to determine working conditions, wages, and benefits for their employees. In summary, local unions can be referred to by many names, but they all aim to protect the rights and interests of workers in a particular industry.