overload vs burden

overload and burden both are nouns.

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

As nouns, burden is a hypernym of overload; that is, burden is a word with a broader meaning than overload:

Other hypernyms of overload include load, loading.

As nouns, burden is a hypernym of overload; that is, burden is a word with a broader meaning than overload:

Other hypernyms of overload include load, loading.

overload (noun)	burden (noun)
an excessive burden	weight to be borne or conveyed
an electrical load that exceeds the available electrical power	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

overload (verb)	burden (verb)
fill to excess so that function is impaired	impose a task upon, assign a responsibility to
place too much a load on	weight down with a load
become overloaded