undecagon
noun
un·dec·a·gon
ˌənˈdekəˌgän
plural -s
: a plane figure having eleven angles and eleven sides
Word History
Etymology
undec- + -agon (as in decagon)
- butter-rose
- butterball
- butterballs
- butterbeans
- butterbill
- butterboat
- butterboat-bill
- butterboat-billed coot
- butterbread
- butterbump
- butterbur
- butterburs
- butterbush
- buttercream
- buttercrunch
- buttercrunch lettuce
- buttercrunches
- buttercrunchs
- buttercup
- buttercup family
- buttercup primrose
- buttercup squash
- buttercup yellow
- buttercups
- butterdocks