pianism vs performance

pianism and performance both are nouns.

Word	Noun	Adjective	Verb	Adverb
pianism	Yes	No	No	No
performance	Yes	No	No	No

As nouns, performance is a hypernym of pianism; that is, performance is a word with a broader meaning than pianism:

Other hypernyms of pianism include public presentation.

pianism (noun)	performance (noun)
performance by or technique of a pianist	the act of performing; of doing something successfully; using knowledge as distinguished from merely possessing it
	the act of presenting a play or a piece of music or other entertainment
	any recognized accomplishment
	a dramatic or musical entertainment
	process or manner of functioning or operating