piping guan vs guan

piping guan and guan both are nouns.

Word	Noun	Adjective	Verb	Adverb
piping guan	Yes	No	No	No
guan	Yes	No	No	No

As nouns, guan is a hypernym of piping guan; that is, guan is a word with a broader meaning than piping guan:

piping guan: a kind of guan
guan: any of several large turkey-like game birds of the family Cracidae; native to jungles of tropical America; resembling the curassows and valued as food

piping guan (noun)	guan (noun)
a kind of guan	any of several large turkey-like game birds of the family Cracidae; native to jungles of tropical America; resembling the curassows and valued as food