droning vs drone

droning and drone both are nouns.

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

As nouns, droning and drone are synonyms defined as:

Other synonyms of droning include monotone.

droning (noun)	drone (noun)
an unchanging intonation	stingless male bee in a colony of social bees (especially honeybees) whose sole function is to mate with the queen
	a pipe of the bagpipe that is tuned to produce a single continuous tone
	an aircraft without a pilot that is operated by remote control
	an unchanging intonation
	someone who takes more time than necessary; someone who lags behind

droning (verb)	drone (verb)
	talk in a monotonous voice
	make a monotonous low dull sound