fearsome
adjective /ˈfɪəsəm/
  /ˈfɪrsəm/
 (formal)- making people feel very frightened- a fearsome dinosaur
- He has a fearsome reputation as a fighter.
- a fearsome expression/sight
 Oxford Collocations DictionaryFearsome is used with these nouns:- adversary
- beast
- reputation
- …