pouch vs protrude

pouch is a noun but protrude is not a noun.

Word	Noun	Adjective	Verb	Adverb
pouch	Yes	No	Yes	No
protrude	No	No	Yes	No

As verbs, pouch and protrude are synonyms defined as:

Other synonyms of pouch include bulge.

pouch (noun)	protrude (noun)
a small or medium size container for holding or carrying things
(anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican)
an enclosed space

pouch (verb)	protrude (verb)
swell or protrude outwards	swell or protrude outwards
put into a small bag	bulge outward
send by special mail that goes through diplomatic channels	extend out or project in space