player piano vs Pianola

player piano and Pianola both are nouns.

Word	Noun	Adjective	Verb	Adverb
player piano	Yes	No	No	No
Pianola	Yes	No	No	No

As nouns, player piano and Pianola are synonyms defined as:

player piano and Pianola: a mechanically operated piano that uses a roll of perforated paper to activate the keys

Other synonyms of player piano include mechanical piano.

player piano (noun)	Pianola (noun)
a mechanically operated piano that uses a roll of perforated paper to activate the keys	a mechanically operated piano that uses a roll of perforated paper to activate the keys