listening watch vs continuous receiver watch

listening watch and continuous receiver watch both are nouns.

Word	Noun	Adjective	Verb	Adverb
listening watch	Yes	No	No	No
continuous receiver watch	Yes	No	No	No

As nouns, listening watch and continuous receiver watch are synonyms defined as:

listening watch and continuous receiver watch: a watch established for the reception of traffic of interest to the unit maintaining the watch

listening watch (noun)	continuous receiver watch (noun)
a watch established for the reception of traffic of interest to the unit maintaining the watch	a watch established for the reception of traffic of interest to the unit maintaining the watch