armed, military, motorcycle, police, security
convoy, destroyer, fighter (esp. AmE)
female, male

be accompanied by, have
She had a police escort to the hospital.

give sb, provide (sb with), send
Can you give us an escort?
The army provided a small armed escort for the delegation.

need, require
The referee needed a police escort as he left the stadium.

vehicle, vessel
duty, mission (esp. AmE)
Get your planes ready for escort duties.

service

under escort
The opposition leader was arrested and taken to the capital under escort.

with an escort, without an escort
They left with a small escort.

escort for
an escort for the Queen's car

escort of
an escort of ten soldiers

Escort is used with these nouns as the subject:
guard

Escort is used with these nouns as the object:
convoy, shipment