umbrella

nouns

a lightweight handheld collapsible canopy
is a type of (narrower)
a covering (usually of cloth) that serves as a roof to shelter an area from the weather
a formation of military planes maintained over ground operations or targets
"an air umbrella over England"
domain category
the military forces of a nation
"their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"
is a type of (narrower)
(military) military action or resources protecting a country against potential enemies
"they died in the defense of Stalingrad"; "they were developed for the defense program"
having the function of uniting a group of similar things
"the Democratic Party is an umbrella for many liberal groups"; "under the umbrella of capitalism"
is a type of (narrower)
the act of making or becoming a single unit
"the union of opposing factions"; "he looked forward to the unification of his family for the holidays"

adjectives

covering or applying simultaneously to a number of similar items or elements or groups
"an umbrella organization"; "umbrella insurance coverage"
is similar to
including all or everything
"comprehensive coverage"; "a comprehensive history of the revolution"; "a comprehensive survey"; "a comprehensive education"