fipple flute vs vertical flute

fipple flute and vertical flute both are nouns.

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

As nouns, fipple flute and vertical flute are synonyms defined as:

fipple flute and vertical flute: a tubular wind instrument with 8 finger holes and a fipple mouthpiece

Other synonyms of fipple flute include fipple pipe, recorder.

fipple flute (noun)	vertical flute (noun)
a tubular wind instrument with 8 finger holes and a fipple mouthpiece	a tubular wind instrument with 8 finger holes and a fipple mouthpiece