radar beacon vs racon

radar beacon and racon both are nouns.

Word	Noun	Adjective	Verb	Adverb
radar beacon	Yes	No	No	No
racon	Yes	No	No	No

As nouns, radar beacon and racon are synonyms defined as:

radar beacon and racon: a device that, on receiving radar signals, transmits coded signals in response to help navigators determine their position

radar beacon (noun)	racon (noun)
a device that, on receiving radar signals, transmits coded signals in response to help navigators determine their position	a device that, on receiving radar signals, transmits coded signals in response to help navigators determine their position