#endlessness__endlessnes  the property of being (or seeming to be) without end
  supertype:  duration.temporal_property__length  continuance in time; "the ceremony was of short duration"; "he complained about the length of time required"
  subtype:  continuousness__ceaselessness__ceaselessnes__incessantness__incessantnes  the quality of something that continues without end or interruption

No statement uses or specializes endlessness; click here to add one.