psychometry vs psychometrics

psychometry and psychometrics both are nouns.

Word	Noun	Adjective	Verb	Adverb
psychometry	Yes	No	No	No
psychometrics	Yes	No	No	No

As nouns, psychometry and psychometrics are synonyms defined as:

psychometry and psychometrics: any branch of psychology concerned with psychological measurements

Other synonyms of psychometry include psychometrika.

psychometry (noun)	psychometrics (noun)
any branch of psychology concerned with psychological measurements	any branch of psychology concerned with psychological measurements