The term 'ruge' refers to a deep, rough, and resonant sound produced by a large, wild animal like a lion, bear, or tiger. There are several synonyms for this word that capture the essence of this sound, such as roar, growl, snarl, bellow, and howl. Each of these terms connotes a distinct type of sound produced by the animal and can also be used figuratively to describe the loud and aggressive behavior of humans or other entities. These words can be used interchangeably depending on the context of the sentence and the intended effect on the reader or listener.