require vs burden

require is not a noun while burden is a noun.

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

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

Other hyponyms of require include charge, saddle, requisition, disallow, forbid, interdict, nix, prohibit, proscribe, veto.

require (noun)	burden (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

require (verb)	burden (verb)
make someone do something	impose a task upon, assign a responsibility to
consider obligatory; request and expect	weight down with a load
have need of
require as useful, just, or proper