wading pool vs pool

wading pool and pool both are nouns.

Word	Noun	Adjective	Verb	Adverb
wading pool	Yes	No	No	No
pool	Yes	No	Yes	No

As nouns, pool is a hypernym of wading pool; that is, pool is a word with a broader meaning than wading pool:

wading pool (noun)	pool (noun)
a shallow pool for children	any of various games played on a pool table having 6 pockets
	an excavation that is (usually) filled with water
	an association of companies for some definite purpose
	an organization of people or resources that can be shared
	something resembling a pool of liquid
	a small lake
	a small body of standing water (rainwater) or other liquid
	any communal combination of funds
	the combined stakes of the betters

wading pool (verb)	pool (verb)
	join or form a pool of people
	combine into a common fund