pocket vs pouch

pocket and pouch both are nouns.

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

As nouns, pouch is a hypernym of pocket; that is, pouch is a word with a broader meaning than pocket:

As nouns, pocket and pouch are synonyms defined as:

pocket and pouch: (anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican)

As nouns, pocket and pouch are synonyms defined as:

Other synonyms of pocket include sac, sack.

pocket (noun)	pouch (noun)
a small pouch inside a garment for carrying small articles	a small or medium size container for holding or carrying things
an opening at the corner or on the side of a billiard table into which billiard balls are struck	(anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican)
(anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican)	an enclosed space
a small isolated group of people
a local region of low pressure or descending air that causes a plane to lose height suddenly
a supply of money
an enclosed space
a hollow concave shape made by removing something
(bowling) the space between the headpin and the pins behind it on the right or left

pocket (verb)	pouch (verb)
put in one's pocket	swell or protrude outwards
take unlawfully	put into a small bag
	send by special mail that goes through diplomatic channels