twinship

/ˈtwɪnˌʃɪp/
noun
  1. The state or condition of being a twin or of being closely connected or similar to another person or thing.
    • In the novel, the twinship between the brothers is tested by their different life choices.
    • The two cities have a special twinship, exchanging cultural programs every year.
    • Their twinship was obvious from their matching smiles and shared mannerisms.
What does "twinship" mean? | whatsthatwordmean | whatsthatwordmean