taking over vs succession

taking over and succession both are nouns.

Word	Noun	Adjective	Verb	Adverb
taking over	Yes	No	No	No
succession	Yes	No	No	No

As nouns, taking over and succession are synonyms defined as:

taking over and succession: acquisition of property by descent or by will

taking over (noun)	succession (noun)
acquisition of property by descent or by will	the action of following in order
	acquisition of property by descent or by will
	a following of one thing after another in time
	a group of people or things arranged or following in order
	(ecology) the gradual and orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is established