burden vs headache

burden and headache both are nouns.

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

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

Other hypernyms of burden include concern, vexation, worry.

burden (noun)	headache (noun)
weight to be borne or conveyed	something or someone that causes anxiety; a source of unhappiness
the central idea that is expanded in a document or discourse	pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs
an onerous or difficult concern
the central meaning or theme of a speech or literary work

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