damper block vs piano damper

damper block and piano damper both are nouns.

Word	Noun	Adjective	Verb	Adverb
damper block	Yes	No	No	No
piano damper	Yes	No	No	No

As nouns, damper block and piano damper are synonyms defined as:

damper block and piano damper: damper consisting of a small felted block that drops onto a piano string to stop its vibration

damper block (noun)	piano damper (noun)
damper consisting of a small felted block that drops onto a piano string to stop its vibration	damper consisting of a small felted block that drops onto a piano string to stop its vibration