pilotless aircraft vs radio-controlled aircraft

pilotless aircraft and radio-controlled aircraft both are nouns.

Word	Noun	Adjective	Verb	Adverb
pilotless aircraft	Yes	No	No	No
radio-controlled aircraft	Yes	No	No	No

As nouns, pilotless aircraft and radio-controlled aircraft are synonyms defined as:

pilotless aircraft and radio-controlled aircraft: an aircraft without a pilot that is operated by remote control

Other synonyms of pilotless aircraft include drone.

pilotless aircraft (noun)	radio-controlled aircraft (noun)
an aircraft without a pilot that is operated by remote control	an aircraft without a pilot that is operated by remote control