Synonyms for growl

noun

1. A low, beastlike sound

   snarl, gnarl, gnar*, moan, bark, bellow, rumble, roar, howl, grumble, grunt.

2. Speech resembling a growl, sense 1

   grumble, rumble, mumble; see noise 1.

verb

1. To make a low, deep sound

   snarl, gnarl, gnar*; see grumble 2.

2. To speak as if growling

   snarl, grumble, upbraid; see complain 1, scold.