Substitute for Replace with
They substituted gold with paper money.
They replaced gold with paper money.
We replace one thing with another, but. we substitute one thing for another The two phrase* mean the reverse of each other You replace gold with paper money you substitute paper money for gold'
Most Powerful Weapons In History
The Predator and Predator B aka The Reaper
Used by the United States, the Royal Air Force, and the Italian Air Force, these drones are becoming increasingly common for both combat and recon operations.