Which one is a collective noun?

Fleet - a collection of ships or vessels.
Bengali Meaning: নৌবহর।
A Collective noun (সমষ্টিবাচক বিশেষ্য) is the name of a number (or collection) of persons or things taken together and spoken of a one whole; as crowd, mob, team, flock, herd, army, fleet, jury, family, nation, parliament, committee.
Source: Wren and Martin