spial /spīˈəl/ (obsolete)

1. Observation, watch
2. A spy, scout

• diorite
• diorites
• dioritic
• diorthoses
• diorthosis
• diorthotic
• Dioscorea
• Dioscoreaceae
• dioscoreaceous
• Dioscuri
• diosgenin
• diosgenins
• diota
• diotas
• Diothelete
• Diotheletic
• Diotheletical
• Diothelism
• Diothelite
• dioxan
• dioxane
• dioxanes
• dioxans
• dioxide
• dioxides