radio detection and ranging vs radar

radio detection and ranging and radar both are nouns.

Word	Noun	Adjective	Verb	Adverb
radio detection and ranging	Yes	No	No	No
radar	Yes	No	No	No

As nouns, radio detection and ranging and radar are synonyms defined as:

radio detection and ranging and radar: measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects

Other synonyms of radio detection and ranging include microwave radar, radiolocation.

radio detection and ranging (noun)	radar (noun)
measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects	measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects