Noun change

Singular
howling

Plural
howlings

  1. (countable & uncountable) The act of producing howls.
    The howling of the wolves can be heard for several miles.

Verb change

Plain form
howl

Third-person singular
howls

Past tense
howled

Past participle
howled

Present participle
howling

 
The wolves are howling
  1. The present participle of howl.
    The wolves are howling tonight.