connotation vs significance

connotation and significance both are nouns.

Word	Noun	Adjective	Verb	Adverb
connotation	Yes	No	No	No
significance	Yes	No	No	No

As nouns, significance is a hypernym of connotation; that is, significance is a word with a broader meaning than connotation:

connotation: what you must know in order to determine the reference of an expression
significance: the message that is intended or expressed or signified

Other hypernyms of connotation include import, meaning, signification.

connotation (noun)	significance (noun)
an idea that is implied or suggested	the quality of being significant
what you must know in order to determine the reference of an expression	a meaning that is not expressly stated but can be inferred
	the message that is intended or expressed or signified