biosystematics vs biosystematy

biosystematics and biosystematy both are nouns.

Word	Noun	Adjective	Verb	Adverb
biosystematics	Yes	No	No	No
biosystematy	Yes	No	No	No

As nouns, biosystematics and biosystematy are synonyms defined as:

biosystematics and biosystematy: use of data (e.g. cytogenetic or biochemical) to assess taxonomic relations especially within an evolutionary framework

biosystematics (noun)	biosystematy (noun)
use of data (e.g. cytogenetic or biochemical) to assess taxonomic relations especially within an evolutionary framework	use of data (e.g. cytogenetic or biochemical) to assess taxonomic relations especially within an evolutionary framework