table-tennis racquet vs table-tennis bat

table-tennis racquet and table-tennis bat both are nouns.

Word	Noun	Adjective	Verb	Adverb
table-tennis racquet	Yes	No	No	No
table-tennis bat	Yes	No	No	No

As nouns, table-tennis racquet and table-tennis bat are synonyms defined as:

table-tennis racquet and table-tennis bat: paddle used to play table tennis

Other synonyms of table-tennis racquet include pingpong paddle.

table-tennis racquet (noun)	table-tennis bat (noun)
paddle used to play table tennis	paddle used to play table tennis