parlour grand vs parlour grand piano

parlour grand and parlour grand piano both are nouns.

Word	Noun	Adjective	Verb	Adverb
parlour grand	Yes	No	No	No
parlour grand piano	Yes	No	No	No

As nouns, parlour grand and parlour grand piano are synonyms defined as:

Other synonyms of parlour grand include baby grand, baby grand piano, parlor grand, parlor grand piano.

parlour grand (noun)	parlour grand piano (noun)
a small grand piano	a small grand piano