long
loud
eerie, unearthly
He broke down and let out an unearthly howl.

give, let out
hear

with a howl
With a howl he leaped at his foe.

howl of
a howl of pain
howls of laughter/protest

be greeted with howls of sth, be met with howls of sth (both esp. BrE)
His comments were met with howls of outrage.

Howl is used with these nouns as the subject:
dog, wind, wolf