Synonyms of 'confederate'
If you describe someone as your ally, you mean that they help and support you, especially when other people are opposing you.
He is a close ally of the Prime Minister.
If you ally yourself with someone or something, you give your support to them.
We need to ally economic freedom with personal liberty.
When two or more things, especially organizations, amalgamate or are amalgamated, they become one large thing.
The firm has amalgamated with an American company.
Associated is used in the name of a company that is made up of a number of smaller companies which have joined together.
the Associated Press
Your colleagues are the people you work with, especially in a professional job.
Three of my colleagues have been made redundant.
If two or more groups or organizations combine or if someone combines them, they join to form a single group or organization.
Different states or groups can combine to enlarge their markets.
A federal country or system of government is one in which the different states or provinces of the country have important powers to make their own laws and decisions.
Communist deputies in the federal assembly
Federated states or societies are ones that have joined together for a common purpose.
a larger federated Europe
If one thing merges with another, or is merged with another, they combine or come together to make one whole thing. You can also say that two things merge, or are merged.
The two countries merged into one.
Thesaurus for confederate from the Collins English Thesaurus
Someone's confederates are the people they are working with in a secret activity.