Mount an attack.
Mount a play.
Word: "mount"
the same meaning

Oil field.
He longed for the fields of his youth.
Word: "field"
the same meaning

The region is a few molecules wide at the summit.
In summer, it is possible to hike to the summit of Mt. Shasta.
Word: "summit"
the same meaning

I shall be writing to you soon.
It had been six days since his departure, when I received a letter from him.
Word: "be"
the same meaning