Scot
scot
dent
dish, tray, bowl
Scot
Serb
Scot
Ainu
If you mean "What is a native American tribe with a four-letter name?", there are quite a few in North and South America:CoosCoraCreeCrowErieEyakHareHopiHupaIowaMonoPimaPomoSauk (Saki)SeriTiwaTowaTewaYahiYanaYukiYumaZuniPaezRemoSapeBoraDuitYoraBareMacaBariCaraThere are many more.
Tuba? Unfortunately I don't think there's a word specifically describing vegetables whose names end in a.
Glasgow only has two airports. However, the flight from London to Glasgow could be from Heathrow, Gatwick, Luton or Stansted.
Four and a Half Hours
Eighty four