howl vs yawp

howl is a noun but yawp is not a noun.

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

As verbs, yawp is a hyponym of howl; that is, yawp is a word with a more specific, narrower meaning than howl:

Other hyponyms of howl include vroom, bawl, thunder.

howl (noun)	yawp (noun)
a long loud emotional utterance
a loud sustained noise resembling the cry of a hound
the long plaintive cry of a hound or a wolf

howl (verb)	yawp (verb)
laugh unrestrainedly and heartily	complain whiningly
make a loud noise, as of wind, water, or vehicles	make a raucous noise
emit long loud cries
cry loudly, as of animals