limitless in WordNet English dictionary

1. seemingly boundless in amount, number, degree, or especially extent
   "unbounded enthusiasm"; "children with boundless energy"; "a limitless supply of money"
   boundless  unbounded  limitless 
   
2. without limits in extent or size or quantity
   "limitless vastness of our solar system"
   illimitable  limitless  measureless 
   
3. having no limits in range or scope
   "to start with a theory of unlimited freedom is to end up with unlimited despotism"- Philip Rahv; "the limitless reaches of outer space"
   unlimited  limitless