series vs succession

series and succession both are nouns.

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

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

series (noun)	succession (noun)
(mathematics) the sum of a finite or infinite sequence of expressions	the action of following in order
a periodical that appears at scheduled times	acquisition of property by descent or by will
a serialized set of programs	a following of one thing after another in time
(sports) several contests played successively by the same teams	a group of people or things arranged or following in order
similar things placed in order or happening one after another	(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
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