burden vs adjure

burden is a noun but adjure is not a noun.

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

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

Other hyponyms of burden include overburden, bear down, deluge, flood out, overwhelm.

burden (noun)	adjure (noun)
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

burden (verb)	adjure (verb)
impose a task upon, assign a responsibility to	command solemnly
weight down with a load	ask for or request earnestly