celesta vs keyboard instrument

celesta and keyboard instrument both are nouns.

Word	Noun	Adjective	Verb	Adverb
celesta	Yes	No	No	No
keyboard instrument	Yes	No	No	No

As nouns, keyboard instrument is a hypernym of celesta; that is, keyboard instrument is a word with a broader meaning than celesta:

celesta: a musical instrument consisting of graduated steel plates that are struck by hammers activated by a keyboard
keyboard instrument: a musical instrument that is played by means of a keyboard

celesta (noun)	keyboard instrument (noun)
a musical instrument consisting of graduated steel plates that are struck by hammers activated by a keyboard	a musical instrument that is played by means of a keyboard