Empusa /em-pūˈzə/

1. A goblin or spectre sent by Hecate (Gr myth; also without cap; also empuseˈ)
2. A genus of fungi parasitic upon houseflies and other insects

• lockfuls
• lock gate
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• lock horns
• lock-hospital
• lock-hospitals
• lockhouse
• lockhouses
• Lockian
• lock in
• lock-in
• locking
• locking-nut
• lock-ins
• Lockist
• lockjaw
• lockjaws
• lock-keeper
• lock-keepers
• lockless
• lockman
• lockmen
• locknut
• locknuts
• lock on