ululation vs howl

ululation and howl both are nouns.

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

As nouns, ululation and howl are synonyms defined as:

Other synonyms of ululation include howling.

ululation (noun)	howl (noun)
a long loud emotional utterance	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

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