percussion vs drumming

percussion and drumming both are nouns.

Word	Noun	Adjective	Verb	Adverb
percussion	Yes	No	No	No
drumming	Yes	No	No	No

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

percussion (noun)	drumming (noun)
the act of exploding a percussion cap	the act of playing drums
the act of playing a percussion instrument
tapping a part of the body for diagnostic purposes
the section of a band or orchestra that plays percussion instruments