What is some synonym for the word drone?

Here are some synonyms for "drone" depending on the context:

For unmanned aerial vehicles (UAVs):

* UAV (Unmanned Aerial Vehicle)

* UAS (Unmanned Aircraft System)

* RPAS (Remotely Piloted Aircraft System)

* Remotely controlled aircraft

* Remotely piloted vehicle

* Unmanned aircraft

* Flying robot

For a continuous low humming sound:

* Buzz

* Hum

* Whine

* Rumble

* Moan

* Rattle

For a person who is lazy or idle:

* Loafer

* Idler

* Sluggard

* Good-for-nothing

* Couch potato

For a monotonous or boring speech:

* Monotone

* Repetitive

* Tedious

* Dull

* Uninspired

For the male bee:

* Male bee

* Worker bee

For the act of making a continuous low humming sound:

* Hum

* Buzz

* Whine

Remember to choose the synonym that best fits the meaning and context of your sentence.