hollow vs holler

hollow and holler both are nouns.

Word	Noun	Adjective	Verb	Adverb
hollow	Yes	Yes	Yes	No
holler	Yes	No	Yes	No

As nouns, hollow and holler are synonyms defined as:

hollow (noun)	holler (noun)
a depression hollowed out of solid matter	a very loud utterance (like the sound of an animal)
a small valley between mountains	a small valley between mountains
a cavity or space in something

hollow (adjective)	holler (adjective)
not solid; having a space or gap or cavity
lacking in substance or character
devoid of significance or force
as if echoing in a hollow space

hollow (verb)	holler (verb)
remove the interior of	complain
remove the inner part or the core of	utter a sudden loud cry
	shout out