intonation vs droning

intonation and droning both are nouns.

Word	Noun	Adjective	Verb	Adverb
intonation	Yes	No	No	No
droning	Yes	No	No	No

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

Other hyponyms of intonation include intonation pattern, drone, monotone, singsong.

intonation (noun)	droning (noun)
the act of singing in a monotonous tone	an unchanging intonation
singing by a soloist of the opening piece of plainsong
the production of musical tones (by voice or instrument); especially the exactitude of the pitch relations
rise and fall of the voice pitch