succession vs series

succession and series both are nouns.

Word	Noun	Adjective	Verb	Adverb
succession	Yes	No	No	No
series	Yes	No	No	No

As nouns, series is a hypernym of succession; that is, series is a word with a broader meaning than succession:

succession (noun)	series (noun)
the action of following in order	(mathematics) the sum of a finite or infinite sequence of expressions
acquisition of property by descent or by will	a periodical that appears at scheduled times
a following of one thing after another in time	a serialized set of programs
a group of people or things arranged or following in order	(sports) several contests played successively by the same teams
(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	similar things placed in order or happening one after another
	a group of postage stamps having a common theme or a group of coins or currency selected as a group for study or collection
	(electronics) connection of components in such a manner that current flows first through one and then through the other