replace vs oust

replace and oust both are verbs.

Word	Noun	Adjective	Verb	Adverb
replace	No	No	Yes	No
oust	No	No	Yes	No

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

Other hyponyms of replace include deputise, deputize, step in, substitute, displace, preempt, usurp.

replace (verb)	oust (verb)
substitute a person or thing for (another that is broken or inefficient or lost or no longer working or yielding what is expected)	remove from a position or office
put something back where it belongs	remove and replace
put in the place of another; switch seemingly equivalent items
take the place or move into the position of