forte-piano vs Pianola

forte-piano and Pianola both are nouns.

Word	Noun	Adjective	Verb	Adverb
forte-piano	Yes	No	No	No
Pianola	Yes	No	No	No

As nouns, Pianola is a hyponym of forte-piano; that is, Pianola is a word with a more specific, narrower meaning than forte-piano:

forte-piano: a keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds
Pianola: a mechanically operated piano that uses a roll of perforated paper to activate the keys

Other hyponyms of forte-piano include grand, grand piano, mechanical piano, player piano, upright, upright piano.

forte-piano (noun)	Pianola (noun)
a keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds	a mechanically operated piano that uses a roll of perforated paper to activate the keys