The term UPPER CHAMBER refers to a chamber of government that is higher in authority than the lower chamber. This term can be represented by three different words: ATTIC (5 letters), SENATE (6 letters), and LOFT (4 letters). The word ATTIC refers to the uppermost room in a house, while the word SENATE refers to the upper chamber of a bicameral legislature. Finally, the word LOFT refers to an upper room or story in a building.