roar vs laugh

roar and laugh both are nouns.

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

As verbs, laugh is a hypernym of roar; that is, laugh is a word with a broader meaning than roar:

Other hypernyms of roar include express joy, express mirth.

roar (noun)	laugh (noun)
a very loud utterance (like the sound of an animal)	the sound of laughing
a deep prolonged loud noise	a humorous anecdote or remark intended to provoke laughter
the sound made by a lion	a facial expression characteristic of a person laughing

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