palaestra vs playing area

palaestra and playing area both are nouns.

Word	Noun	Adjective	Verb	Adverb
palaestra	Yes	No	No	No
playing area	Yes	No	No	No

As nouns, playing area is a hypernym of palaestra; that is, playing area is a word with a broader meaning than palaestra:

palaestra: a public place in ancient Greece or Rome devoted to the training of wrestlers and other athletes
playing area: a piece of land prepared for playing a game

Other hypernyms of palaestra include athletic field, field, playing field.

palaestra (noun)	playing area (noun)
a public place in ancient Greece or Rome devoted to the training of wrestlers and other athletes	a piece of land prepared for playing a game