limitless
adjective /ˈlɪmɪtləs/
  /ˈlɪmɪtləs/
- without a limit; very great synonym infinite
- the limitless variety of consumer products
 - The possibilities were almost limitless.
 
Oxford Collocations DictionaryLimitless is used with these nouns:- energy
 - expanse
 - potential
 - …