roar vs howl

roar and howl both are nouns.

Word	Noun	Adjective	Verb	Adverb
roar	Yes	No	Yes	No
howl	Yes	No	Yes	No

As verbs, roar and howl are synonyms defined as:

As verbs, roar and howl are synonyms defined as:

As verbs, roar and howl are synonyms defined as:

Other synonyms of roar include ululate, wail, yaup, yawl.

roar (noun)	howl (noun)
a very loud utterance (like the sound of an animal)	a long loud emotional utterance
a deep prolonged loud noise	a loud sustained noise resembling the cry of a hound
the sound made by a lion	the long plaintive cry of a hound or a wolf

roar (verb)	howl (verb)
laugh unrestrainedly and heartily	laugh unrestrainedly and heartily
make a loud noise, as of wind, water, or vehicles	make a loud noise, as of wind, water, or vehicles
emit long loud cries	emit long loud cries
utter words loudly and forcefully	cry loudly, as of animals
make a loud noise, as of animal
act or proceed in a riotous, turbulent, or disorderly way