biometry vs biometrics

biometry and biometrics both are nouns.

Word	Noun	Adjective	Verb	Adverb
biometry	Yes	No	No	No
biometrics	Yes	No	No	No

As nouns, biometry and biometrics are synonyms defined as:

biometry and biometrics: a branch of biology that studies biological phenomena and observations by means of statistical analysis

Other synonyms of biometry include biostatistics.

biometry (noun)	biometrics (noun)
a branch of biology that studies biological phenomena and observations by means of statistical analysis	a branch of biology that studies biological phenomena and observations by means of statistical analysis