"howls" in the noun sense
1. howl, howling, ululation
a long loud emotional utterance
"he gave a howl of pain"
"howls of laughter"
"their howling had no effect"
the long plaintive cry of a hound or a wolf
a loud sustained noise resembling the cry of a hound
"the howl of the wind made him restless"
"howls" in the verb sense
1. howl, ululate, wail, roar, yawl, yaup
emit long loud cries
"wail in self-pity"
"howl with sorrow"
2. howl, wrawl, yammer, yowl
cry loudly, as of animals
"The coyotes were howling in the desert"
3. roar, howl
make a loud noise, as of wind, water, or vehicles
"The wind was howling in the trees"
"The water roared down the chute"
4. roar, howl
laugh unrestrainedly and heartily
Source: WordNet® (An amazing lexical database of English)
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