polo stick vs polo mallet

polo stick and polo mallet both are nouns.

Word	Noun	Adjective	Verb	Adverb
polo stick	Yes	No	No	No
polo mallet	Yes	No	No	No

As nouns, polo stick and polo mallet are synonyms defined as:

polo stick (noun)	polo mallet (noun)
a mallet used to strike the ball in polo	a mallet used to strike the ball in polo