ecology vs bionomics

ecology and bionomics both are nouns.

Word	Noun	Adjective	Verb	Adverb
ecology	Yes	No	No	No
bionomics	Yes	No	No	No

As nouns, ecology and bionomics are synonyms defined as:

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

Other synonyms of ecology include environmental science.

ecology (noun)	bionomics (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