1. A kind of military half pike, used for signalling orders.

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

• apontoon,
• zpontoon,
• xpontoon,
• dpontoon,
• epontoon,
• wpontoon,
• soontoon,
• slontoon,
• s-ontoon,
• s0ontoon,
• spintoon,
• spkntoon,
• splntoon,
• sponton,
• Spontan,
• Spontoonie,
• Spontoun,
• Spontuon,
• Sponteen,
• Spountoon

The adjective form of the word "Spontoon" is "spontoony".

The plural form of the word "spontoon" is "spontoons"

The singular form of the word "Spontoon" remains as "Spontoon".