1. The sacred order of learned men, among the ancient Celtic nations, in Gaul, Britain, and Germany, who skilled in the arts and sciences of the day, were the ministers of religion and justice, as well as the teachers of youth to the whole community, and exercised an absolute control over the unlettered people whom they governed; they worshipped in groves of oak and held the oak-tree sacred.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• dreds,
• dicids,
• dtuies,
• dubds,
• adroids,
• druit,
• driads,
• drils,
• driils,
• traids,
• desids,
• drcide,
• druds,
• dounds,
• draids,
• droid,
• drued,
• druied,
• drieds,
• gruida

• dries,
• rids,
• raids,
• dreads.

The adjective form of the word "druids" is "druidic".