watering hole vs playground

watering hole and playground both are nouns.

Word	Noun	Adjective	Verb	Adverb
watering hole	Yes	No	No	No
playground	Yes	No	No	No

As nouns, playground is a hypernym of watering hole; that is, playground is a word with a broader meaning than watering hole:

watering hole: a health resort near a spring or at the seaside
playground: an area where many people go for recreation, holidays or other purposes

Other hypernyms of watering hole include resort area, vacation spot.

watering hole (noun)	playground (noun)
a health resort near a spring or at the seaside	yard consisting of an outdoor area for children's play
	an area where many people go for recreation, holidays or other purposes