indifferent vs inferior

indifferent is not a noun while inferior is a noun.

Word	Noun	Adjective	Verb	Adverb
indifferent	No	Yes	No	No
inferior	Yes	Yes	No	No

indifferent (noun)	inferior (noun)
	a character or symbol set or printed or written beneath or slightly below and to the side of another character
	one of lesser rank or station or quality

indifferent (adjective)	inferior (adjective)
(usually followed by `to') unwilling or refusing to pay heed	written or printed below and to one side of another character
characterized by a lack of partiality	of or characteristic of low rank or importance
fairly poor to not very good	of low or inferior quality
neither too great nor too little	having an orbit between the sun and the Earth's orbit
being neither good nor bad	lower than a given reference point
showing no care or concern in attitude or action	falling short of some prescribed norm
(often followed by `to') lacking importance; not mattering one way or the other
marked by a lack of interest
having only a limited ability to react chemically; chemically inactive
marked by no especial liking or dislike or preference for one thing over another