taxonomist vs taxonomer

taxonomist and taxonomer both are nouns.

Word	Noun	Adjective	Verb	Adverb
taxonomist	Yes	No	No	No
taxonomer	Yes	No	No	No

As nouns, taxonomist and taxonomer are synonyms defined as:

taxonomist and taxonomer: a biologist who specializes in the classification of organisms into groups on the basis of their structure and origin and behavior

Other synonyms of taxonomist include systematist.

taxonomist (noun)	taxonomer (noun)
a biologist who specializes in the classification of organisms into groups on the basis of their structure and origin and behavior	a biologist who specializes in the classification of organisms into groups on the basis of their structure and origin and behavior