1. The seed or fruit of the oak; a small conical piece of wood, fixed on the spindle above the vane, to keep the vane from being blown off.

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

• acob,
• auborn,
• ajoin,
• acrre,
• acroyn,
• acard,
• adjorn,
• dcown,
• ajurn,
• afforn,
• accorns,
• acur,
• acorss,
• uconn,
• acion,
• acors,
• aclown,
• scourn,
• ajor,
• acoord

• acarine,
• acromion,
• Achorn,
• acronym,
• Acierno,
• acarina,
• acrimony.

The adjective form of the word "acorn" is "acorned". However, this adjective isn't commonly used.

The plural of the "acorn" can be the "acorns".

The singular of the "acorn" can be the "acorn".