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