keyboard vs clavier

keyboard and clavier both are nouns.

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

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

keyboard: device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like
clavier: a bank of keys on a musical instrument

Other hyponyms of keyboard include computer keyboard, keypad, fingerboard, piano keyboard, typewriter keyboard.

keyboard (noun)	clavier (noun)
holder consisting of an arrangement of hooks on which keys or locks can be hung	a bank of keys on a musical instrument
device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like	a stringed instrument that has a keyboard