bandoneon vs concertina

bandoneon and concertina both are nouns.

Word	Noun	Adjective	Verb	Adverb
bandoneon	Yes	No	No	No
concertina	Yes	No	Yes	No

As nouns, concertina is a hypernym of bandoneon; that is, concertina is a word with a broader meaning than bandoneon:

bandoneon: a type of concertina popular in South America
concertina: free-reed instrument played like an accordion by pushing its ends together to force air through the reeds

bandoneon (noun)	concertina (noun)
a type of concertina popular in South America	free-reed instrument played like an accordion by pushing its ends together to force air through the reeds
	coiled barbed wire used as an obstacle

bandoneon (verb)	concertina (verb)
	collapse like a concertina