1. (noun) a fresh horse especially (formerly) to replace one killed or injured in battle

• mount
• riding horse
• saddle horse

2. (verb) mount again

• bestride
• climb on
• get on
• hop on
• jump on
• mount
• mount up

3. (verb) mount again, as after disassembling something

• mount

4. (verb) provide with fresh horses

• horse