arcanum /är-kāˈnəm/

1. A secret or mystery
2. A secret remedy or elixir

• mouse-ear chickweeds
• mouse-eared bat
• mouse-eared bats
• mouse-ears
• mouse hare
• mouse hares
• mouse hole
• mouse holes
• mouse-hunt
• mouse-hunts
• mousekin
• mousekins
• mousemat
• mousemats
• mouse-milking
• mouseover
• mousepad
• mousepads
• mousepiece
• mouse potato
• mouse potatoes
• mouser
• mouseries
• mousers
• mousery