signalling vs recording

signalling and recording both are nouns.

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

As nouns, recording is a hyponym of signalling; that is, recording is a word with a more specific, narrower meaning than signalling:

signalling: any nonverbal action or gesture that encodes a message
recording: a signal that encodes something (e.g., picture or sound) that has been recorded

signalling (noun)	recording (noun)
any nonverbal action or gesture that encodes a message	the act of making a record (especially an audio record)
	a signal that encodes something (e.g., picture or sound) that has been recorded
	a storage device on which information (sounds or images) have been recorded