A1M3P3H4I1T1H4E1A1T1R1E1S1
23 points
AMPHITHEATRES is validvalid
AMPHITHEATRE, an amphitheater
AMPHITHEATRE, an oval or circular building with rising tiers of seats ranged about an open space
AMPHITHEATRE, an amphitheater
AMPHITHEATRE, an oval or circular building with rising tiers of seats ranged about an open space