lesson vs signification

lesson and signification both are nouns.

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

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

Other hypernyms of lesson include import, meaning, significance.

lesson (noun)	signification (noun)
a task assigned for individual study	the message that is intended or expressed or signified
a unit of instruction
punishment intended as a warning to others
the significance of a story or event