environmental science vs ecology

environmental science and ecology both are nouns.

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

As nouns, environmental science and ecology are synonyms defined as:

environmental science and ecology: the branch of biology concerned with the relations between organisms and their environment

Other synonyms of environmental science include bionomics.

environmental science (noun)	ecology (noun)
the branch of biology concerned with the relations between organisms and their environment	the branch of biology concerned with the relations between organisms and their environment
	the environment as it relates to living organisms