piano vs sustaining pedal

piano and sustaining pedal both are nouns.

Word	Noun	Adjective	Verb	Adverb
piano	Yes	Yes	No	Yes
sustaining pedal	Yes	No	No	No

piano (noun)	sustaining pedal (noun)
a keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds	a pedal on a piano that lifts the dampers from the strings and so allows them to continue vibrating
(music) low loudness

piano (adjective)	sustaining pedal (adjective)
(used chiefly as a direction or description in music) soft; in a quiet, subdued tone

piano (adverb)	sustaining pedal (adverb)
used as a direction in music; to be played relatively softly