Groups of eights

• White and black pawns, e.g
• Series of eight
• Day in Ascot rearranged for groups of eight
• Sets of eight
• Planets and notes in the musical scale
• Wild coast hiding first sign of danger for boat crews?
• Flag football teams
• Candles in a menorah, e.g.
• Pairs of quartets

Wiktionary Word definitions in Wiktionary
n. (plural of octad English)