squall vs hollo

squall and hollo both are nouns.

Word	Noun	Adjective	Verb	Adverb
squall	Yes	No	Yes	No
hollo	Yes	No	Yes	No

As verbs, squall and hollo are synonyms defined as:

Other synonyms of squall include call, cry, holler, scream, shout, shout out, yell.

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

squall (noun)	hollo (noun)
sudden violent winds; often accompanied by precipitation	a very loud utterance (like the sound of an animal)

squall (verb)	hollo (verb)
utter a sudden loud cry	utter a sudden loud cry
make high-pitched, whiney noises	cry hollo
blow in a squall	encourage somebody by crying hollo