Yes. Playground is one word.
No, it is not a preposition. The word playground is a noun.
No - it is a compound word
There are only two syllables in the word playground.
Playground is divided between play and ground. The verbal accent sound is on the root word play.
There is no Greek word for golf. We use the word ''golf'' or in Greek letters ''Γκόλφ''.
The word is playground.
The noun playground is a singular, common, concrete, compound noun; an outdoor area provided for children to play, word for a thing; a piece of land used for games and recreation, a word for a place.
The noun golfer is a singular common noun, a word for a player of golf.