cacodemon or cacodaemon /kak-ō-dēˈmən/

1. An evil spirit or devil
2. A nightmare (Shakespeare)

• knowledgably
• knowledge
• knowledgeability
• knowledgeable
• knowledgeably
• knowledge base
• knowledge-based
• knowledge bases
• knowledge box
• knowledge boxes
• knowledged
• knowledge economies
• knowledge economy
• knowledge engineering
• knowledges
• knowledge worker
• knowledge workers
• knowledging
• known
• known as
• known better days
• know-nothing
• know-nothingism
• know-nothings
• knowns