entire
The entire fleet was sunk.

great, huge, large
a large fleet of warships

small
fishing, whaling
merchant, naval
battle, invasion
enemy
submarine, tanker
car, vehicle
the company car fleet

operate
He operated a small fishing fleet.

command
send, send in
The fleet was sent in and the country prepared for war.

ground
defeat, destroy
join
The ship sailed to join the fleet at Barbados.

maintain
To maintain a submarine fleet is a major commitment.
The fleet was very expensive to maintain.

in a/the fleet
There were over 500 ships in the enemy fleet.

fleet of
a fleet of taxis

Fleet is used with these nouns:
commander