biennium/bieʹeni·əm/ noun (pl bienniums biennia /-ə/)

• at first sight
• (at) full pelt
• at full stretch
• at gunpoint
• Athabaskan
• at hack
• Athanasian Creed
• at hand
• Athapaskan
• atheism
• atheling
• athematic
• athenaeum
• Athenian
• atheroma
• atherosclerosis
• at His/Her Majesty's pleasure
• athlete
• athlete's foot
• athletic
• athletics
• athletic support
• at home
• -athon
• a thorn in somebody's flesh/side