meaning vs burden

meaning and burden both are nouns.

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

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

meaning (noun)	burden (noun)
the idea that is intended	weight to be borne or conveyed
the message that is intended or expressed or signified	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

meaning (adjective)	burden (adjective)
rich in significance or implication

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