recorder vs vertical flute

recorder and vertical flute both are nouns.

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

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

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

Other synonyms of recorder include fipple flute, fipple pipe.

recorder (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
equipment for making records
someone responsible for keeping records
a barrister or solicitor who serves as part-time judge in towns or boroughs