duckpin vs bowling pin

duckpin and bowling pin both are nouns.

Word	Noun	Adjective	Verb	Adverb
duckpin	Yes	No	No	No
bowling pin	Yes	No	No	No

As nouns, bowling pin is a hypernym of duckpin; that is, bowling pin is a word with a broader meaning than duckpin:

duckpin: a bowling pin that is short and squat by comparison with a tenpin
bowling pin: a club-shaped wooden object used in bowling; set up in triangular groups of ten as the target

Other hypernyms of duckpin include pin.

duckpin (noun)	bowling pin (noun)
a bowling pin that is short and squat by comparison with a tenpin	a club-shaped wooden object used in bowling; set up in triangular groups of ten as the target