alliance
n. countablen. a group of people, countries, or organizations that work together to reach a common goal. You use this when different sides agree to help each other for a specific reason.
n. a formal agreement or union between nations, political parties, or organizations to cooperate for a specific purpose. Often implies a strategic partnership based on mutual benefit or shared defense.
The two countries formed a military alliance to protect their borders.
The small tech companies formed a strategic alliance to compete with the industry giants in the global market.
Historians argue that the fragile alliance between the two rival factions was the only thing preventing a total collapse of the provisional government during the crisis.
Often used with the verbs 'form', 'forge', or 'break'. Frequently followed by the preposition 'between' or 'with'.