drumbeat vs signalling

drumbeat and signalling both are nouns.

Word	Noun	Adjective	Verb	Adverb
drumbeat	Yes	No	No	No
signalling	Yes	No	No	No

As nouns, signalling is a hypernym of drumbeat; that is, signalling is a word with a broader meaning than drumbeat:

drumbeat: (military) the beating of a drum as a signal for lowering the flag at sundown
signalling: any nonverbal action or gesture that encodes a message

Other hypernyms of drumbeat include sign, signal, signaling.

drumbeat (noun)	signalling (noun)
a vehement and vociferous advocacy of a cause	any nonverbal action or gesture that encodes a message
(military) the beating of a drum as a signal for lowering the flag at sundown
the sound made by beating a drum