1. Unstable by being overloaded at the top

See also: unstable

• European cranberry
• European cranberrybush
• European creeper
• European cuckoo
• European curlew
• European dewberry
• European dogtooth
• European dune grass
• European Economic Community
• European elder
• European elk
• European elm
• European field elm
• European fire salamander
• European flatfish
• European fly honeysuckle
• European gallinule
• European goatsucker
• European hackberry
• European hare
• European honeysuckle
• European hop
• European hornbeam
• European house cricket
• European ladies' tresses