umbrella

noun

1 they huddled under the umbrella:

parasol, sunshade;

British, informal brolly;

North American, informal bumbershoots;

British, informal , dated gamp.

2 television surveys are conducted under the umbrella of two national bodies:

aegis, auspices, patronage, championship, protection, safe keeping, protectorship, guardianship, support, guidance, charge, responsibility, care, cover, backing, agency.