ouster vs dethronement

ouster and dethronement both are nouns.

Word	Noun	Adjective	Verb	Adverb
ouster	Yes	No	No	No
dethronement	Yes	No	No	No

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

ouster: the act of ejecting someone or forcing them out
dethronement: the act of deposing someone; removing a powerful person from a position or office

Other hyponyms of ouster include deposition.

ouster (noun)	dethronement (noun)
the act of ejecting someone or forcing them out	the act of deposing someone; removing a powerful person from a position or office
a wrongful dispossession
a person who ousts or supplants someone else