playing vs piping

playing and piping both are nouns.

Word	Noun	Adjective	Verb	Adverb
playing	Yes	No	No	No
piping	Yes	No	No	Yes

As nouns, piping is a hyponym of playing; that is, piping is a word with a more specific, narrower meaning than playing:

Other hyponyms of playing include bowing, stopping, transposition.

playing (noun)	piping (noun)
the action of taking part in a game or sport or other recreation	playing a pipe or the bagpipes
the act of playing a musical instrument	a long tube made of metal or plastic that is used to carry water or oil or gas etc.
the performance of a part or role in a drama	a thin strip of covered cord used to edge hems

playing (adverb)	piping (adverb)
	(used of heat) extremely