hollo vs pipe

hollo and pipe both are nouns.

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

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

hollo (noun)	pipe (noun)
a very loud utterance (like the sound of an animal)	a long tube made of metal or plastic that is used to carry water or oil or gas etc.
	a tube with a small bowl at one end; used for smoking tobacco
	the flues and stops on a pipe organ
	a tubular wind instrument
	a hollow cylindrical shape

hollo (verb)	pipe (verb)
utter a sudden loud cry	utter a shrill cry
cry hollo	play on a pipe
encourage somebody by crying hollo	trim with piping
	transport by pipeline