behaviourism vs psychonomics

behaviourism and psychonomics both are nouns.

Word	Noun	Adjective	Verb	Adverb
behaviourism	Yes	No	No	No
psychonomics	Yes	No	No	No

As nouns, psychonomics is a hypernym of behaviourism; that is, psychonomics is a word with a broader meaning than behaviourism:

behaviourism: an approach to psychology that emphasizes observable measurable behavior
psychonomics: the branch of psychology that uses experimental methods to study psychological issues

Other hypernyms of behaviourism include experimental psychology.

behaviourism (noun)	psychonomics (noun)
an approach to psychology that emphasizes observable measurable behavior	the branch of psychology that uses experimental methods to study psychological issues