Answer:

spandrel

Answer	Crossword Clue
SPANDREL	Wall space between adjacent arches
SPANDREL	Panel between the sill of a window and the top of one below it
SPANDREL	Arch area

SPANDREL	Area between adjoining arches
SPANDREL	Architectural space
SPANDREL	Architectural space above an arch
SPANDREL	Space above an arch