tweenager

As nouns the difference between taxonomy and tweenager

is that taxonomy is the science or the technique used to make a classification while tweenager is a young human being that is not yet technically a teenager (being less than thirteen years old), but starting to act like one—generally eight to twelve years old.

Tweenage is a related term of tweenager.

As a noun tweenager

is a young human being that is not yet technically a teenager (being less than thirteen years old), but starting to act like one—generally eight to twelve years old.

As an adjective tweenage is

not yet a teenager (being less than thirteen years old), but starting to act like one.