flute vs piccolo

flute and piccolo both are nouns.

Word	Noun	Adjective	Verb	Adverb
flute	Yes	No	Yes	No
piccolo	Yes	No	No	No

As nouns, piccolo is a hyponym of flute; that is, piccolo is a word with a more specific, narrower meaning than flute:

flute: a high-pitched woodwind instrument; a slender tube closed at one end with finger holes on one end and an opening near the closed end across which the breath is blown
piccolo: a small flute; pitched an octave above the standard flute

Other hyponyms of flute include fife, nose flute, Boehm flute, C flute, transverse flute, Western concert flute.

flute (noun)	piccolo (noun)
a high-pitched woodwind instrument; a slender tube closed at one end with finger holes on one end and an opening near the closed end across which the breath is blown	a small flute; pitched an octave above the standard flute
a groove or furrow in cloth etc (particularly a shallow concave groove on the shaft of a column)
a tall narrow wineglass

flute (verb)	piccolo (verb)
form flutes in