holder vs keyboard

holder and keyboard both are nouns.

Word	Noun	Adjective	Verb	Adverb
holder	Yes	No	No	No
keyboard	Yes	No	No	No

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

holder: a holding device
keyboard: holder consisting of an arrangement of hooks on which keys or locks can be hung

Other hyponyms of holder include candle holder, candlestick, cigarette holder, oarlock, peg, pin, rowlock, thole, tholepin, zarf.

holder (noun)	keyboard (noun)
a holding device	holder consisting of an arrangement of hooks on which keys or locks can be hung
the person who is in possession of a check or note or bond or document of title that is endorsed to him or to whoever holds it	device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like
a person who holds something