environmental science vs succession

environmental science and succession both are nouns.

Word	Noun	Adjective	Verb	Adverb
environmental science	Yes	No	No	No
succession	Yes	No	No	No

environmental science (noun)	succession (noun)
the branch of biology concerned with the relations between organisms and their environment	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