yowl in WordNet English dictionary

1. a very loud utterance (like the sound of an animal)
   "his bellow filled the hallway"
   bellow  bellowing  holla  holler  hollering  hollo  holloa  roar  roaring  yowl 
   

1. utter shrieks, as of cats
   yowl  caterwaul 
   
2. cry loudly, as of animals
   "The coyotes were howling in the desert"
   howl  wrawl  yammer  yowl