inferiority vs backseat

inferiority and backseat both are nouns.

Word	Noun	Adjective	Verb	Adverb
inferiority	Yes	No	No	No
backseat	Yes	No	No	No

As nouns, backseat is a hyponym of inferiority; that is, backseat is a word with a more specific, narrower meaning than inferiority:

Other hyponyms of inferiority include shade, subordinateness, subsidiarity.

inferiority (noun)	backseat (noun)
an inferior quality	a seat at the back of a vehicle (especially the seat at the back of an automobile)
the quality of being a competitive disadvantage	a secondary or inferior position or status
the state of being inferior