flageolet vs fipple flute

flageolet and fipple flute both are nouns.

Word	Noun	Adjective	Verb	Adverb
flageolet	Yes	No	No	No
fipple flute	Yes	No	No	No

As nouns, fipple flute is a hypernym of flageolet; that is, fipple flute is a word with a broader meaning than flageolet:

flageolet: a small fipple flute with four finger holes and two thumb holes
fipple flute: a tubular wind instrument with 8 finger holes and a fipple mouthpiece

Other hypernyms of flageolet include fipple pipe, recorder, vertical flute.

flageolet (noun)	fipple flute (noun)
a small fipple flute with four finger holes and two thumb holes	a tubular wind instrument with 8 finger holes and a fipple mouthpiece
a French bean variety with light-colored seeds; usually dried