curfew vs signalling

curfew and signalling both are nouns.

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

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

curfew: a signal (usually a bell) announcing the start of curfew restrictions
signalling: any nonverbal action or gesture that encodes a message

Other hypernyms of curfew include sign, signal, signaling.

curfew (noun)	signalling (noun)
a signal (usually a bell) announcing the start of curfew restrictions	any nonverbal action or gesture that encodes a message
an order that after a specific time certain activities (as being outside on the streets) are prohibited
the time that the curfew signal is sounded