cobelligerent /kō-bi-lijˈə-rənt/

Co-operating in warfare (also noun)

• out of spirits
• out of step
• out of stock
• out of sync
• out of synch
• out of temper
• out of the Ark
• out of the blue
• out-of-the-body
• out of the frying-pan into the fire
• out of the loop
• out of the ordinary
• out of the question
• out of the road
• out of the running
• out of the same stable
• out of the top drawer
• out of the way
• out-of-the-way
• out of the window
• out of the wood
• out of the woods
• out of thin air
• out of this world
• out of time