octangular (adjective)

1. In the fantasy novel, the protagonist embarks on a quest to find the mystical octangular artifact.

2. The fashion designer showcased a collection of avant-garde octangular accessories on the runway.

3. The horror movie featured a haunted house with octangular windows that emitted an eerie glow in the night.

4. The poet used vivid imagery to describe the octangular castle in his descriptive literature piece.