psychophysics vs psychonomics

psychophysics and psychonomics both are nouns.

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

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

psychophysics: the branch of psychology concerned with quantitative relations between physical stimuli and their psychological effects
psychonomics: the branch of psychology that uses experimental methods to study psychological issues

Other hypernyms of psychophysics include experimental psychology.

psychophysics (noun)	psychonomics (noun)
the branch of psychology concerned with quantitative relations between physical stimuli and their psychological effects	the branch of psychology that uses experimental methods to study psychological issues