button accordion vs squeeze box

button accordion and squeeze box both are nouns.

Word	Noun	Adjective	Verb	Adverb
button accordion	Yes	No	No	No
squeeze box	Yes	No	No	No

As nouns, squeeze box is a hypernym of button accordion; that is, squeeze box is a word with a broader meaning than button accordion:

button accordion: an accordion with buttons rather than keys
squeeze box: a portable box-shaped free-reed instrument; the reeds are made to vibrate by air from the bellows controlled by the player

Other hypernyms of button accordion include accordion.

button accordion (noun)	squeeze box (noun)
an accordion with buttons rather than keys	a portable box-shaped free-reed instrument; the reeds are made to vibrate by air from the bellows controlled by the player