hockey puck vs puck

hockey puck and puck both are nouns.

Word	Noun	Adjective	Verb	Adverb
hockey puck	Yes	No	No	No
puck	Yes	No	No	No

As nouns, hockey puck and puck are synonyms defined as:

hockey puck and puck: a vulcanized rubber disk 3 inches in diameter that is used instead of a ball in ice hockey

hockey puck (noun)	puck (noun)
a vulcanized rubber disk 3 inches in diameter that is used instead of a ball in ice hockey	a vulcanized rubber disk 3 inches in diameter that is used instead of a ball in ice hockey