barcarolle vs song

barcarolle and song both are nouns.

Word	Noun	Adjective	Verb	Adverb
barcarolle	Yes	No	No	No
song	Yes	No	No	No

As nouns, song is a hypernym of barcarolle; that is, song is a word with a broader meaning than barcarolle:

Other hypernyms of barcarolle include vocal.

barcarolle (noun)	song (noun)
a boating song sung by Venetian gondoliers	the act of singing
	a short musical composition with words
	the characteristic sound produced by a bird
	a distinctive or characteristic sound
	a very small sum