table tennis vs Ping-Pong

table tennis and Ping-Pong both are nouns.

Word	Noun	Adjective	Verb	Adverb
table tennis	Yes	No	No	No
Ping-Pong	Yes	No	No	No

As nouns, table tennis and Ping-Pong are synonyms defined as:

table tennis and Ping-Pong: a game (trademark Ping-Pong) resembling tennis but played on a table with paddles and a light hollow ball

Other synonyms of table tennis include ping pong.

table tennis (noun)	Ping-Pong (noun)
a game (trademark Ping-Pong) resembling tennis but played on a table with paddles and a light hollow ball	a game (trademark Ping-Pong) resembling tennis but played on a table with paddles and a light hollow ball