signification vs message

signification and message both are nouns.

Word	Noun	Adjective	Verb	Adverb
signification	Yes	No	No	No
message	Yes	No	Yes	No

As nouns, message is a hypernym of signification; that is, message is a word with a broader meaning than signification:

Other hypernyms of signification include content, subject matter, substance.

signification (noun)	message (noun)
the message that is intended or expressed or signified	content communicating a message; what something is about
	a communication (usually brief) that is written or spoken or signaled