oblige vs indenture

oblige is not a noun while indenture is a noun.

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

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

Other hyponyms of oblige include pledge, article, indent, tie down.

oblige (noun)	indenture (noun)
	a contract binding one party into the service of another for a specified term
	formal agreement between the issuer of bonds and the bondholders as to terms of the debt
	the space left between the margin and the start of an indented line
	a concave cut into a surface or edge (as in a coastline)

oblige (verb)	indenture (verb)
bind by an obligation; cause to be indebted	bind by or as if by indentures, as of an apprentice or servant
provide a service or favor for someone
force somebody to do something