Polygon, for many-sided.
The word is, surprisingly, "nonagon".
Nonagon is the appropriate word for a nine sided plane figure
nonagon is one good word
Nine, ninth, nonagon, or neuf. Those words mean 9.
A nonahedron, which is a 3D shape with 9 faces.
yes.
yes it is
Nonagonal.
nonaligned?
November
A nonagon may also be called an enneagon. Both refer to a 9-sided polygon.
nonagon nonahedron nonuplets