mud puddle vs pool

mud puddle and pool both are nouns.

Word	Noun	Adjective	Verb	Adverb
mud puddle	Yes	No	No	No
pool	Yes	No	Yes	No

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

Other hypernyms of mud puddle include puddle.

mud puddle (noun)	pool (noun)
a puddle of mud	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

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