bastion /bastˈyən or bast-i-ən/

1. A kind of tower at the angle of a fortification
2. A defence, defender (figurative)

• Skye
• skyer
• skyers
• Skye terrier
• Skye terriers
• skyey
• sky-high
• skyhook
• skyhooks
• skyier
• skyiest
• skying
• skyish
• skyjack
• skyjacked
• skyjacker
• skyjackers
• skyjacking
• skyjackings
• skyjacks
• skyjumping
• skylab
• skylabs
• skylark
• skylarked