burden vs vexation

burden and vexation both are nouns.

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

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

Other hypernyms of burden include concern, headache, worry.

burden (noun)	vexation (noun)
weight to be borne or conveyed	the act of troubling or annoying someone
the central idea that is expanded in a document or discourse	something or someone that causes anxiety; a source of unhappiness
an onerous or difficult concern	anger produced by some annoying irritation
the central meaning or theme of a speech or literary work	the psychological state of being irritated or annoyed

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