signification vs burden

signification and burden both are nouns.

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

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

signification (noun)	burden (noun)
the message that is intended or expressed or signified	weight to be borne or conveyed
	the central idea that is expanded in a document or discourse
	an onerous or difficult concern
	the central meaning or theme of a speech or literary work

signification (verb)	burden (verb)
	impose a task upon, assign a responsibility to
	weight down with a load