pianist vs piano

pianist and piano both are nouns.

Word	Noun	Adjective	Verb	Adverb
pianist	Yes	No	No	No
piano	Yes	Yes	No	Yes

pianist (noun)	piano (noun)
a person who plays the piano	a keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds
	(music) low loudness

pianist (adjective)	piano (adjective)
	(used chiefly as a direction or description in music) soft; in a quiet, subdued tone

pianist (adverb)	piano (adverb)
	used as a direction in music; to be played relatively softly