succession vs taking over

succession and taking over both are nouns.

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

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

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

succession (noun)	taking over (noun)
the action of following in order	acquisition of property by descent or by will
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