article vs oblige

article is a noun but oblige is not a noun.

Word	Noun	Adjective	Verb	Adverb
article	Yes	No	Yes	No
oblige	No	No	Yes	No

As verbs, oblige is a hypernym of article; that is, oblige is a word with a broader meaning than article:

Other hypernyms of article include bind, hold, obligate.

article (noun)	oblige (noun)
one of a class of artifacts
nonfictional prose forming an independent part of a publication
(grammar) a determiner that may indicate the specificity of reference of a noun phrase
a separate section of a legal document (as a statute or contract or will)

article (verb)	oblige (verb)
bind by a contract; especially for a training period	bind by an obligation; cause to be indebted
	provide a service or favor for someone
	force somebody to do something