different between overreaction vs taxonomy

English

From over- +? reaction

overreaction (countable and uncountable, plural overreactions)

A reaction that is excessive.
She had every right to dump you, but cutting up all your clothes after she did so was an overreaction.
This whole fear over swine flu was unfounded; it was clearly an overreaction.

Borrowed from French taxonomie. Surface analysis taxo- +? -nomy.

taxonomy (countable and uncountable, plural taxonomies)

The science or the technique used to make a classification.
A classification; especially, a classification in a hierarchical system.
(taxonomy, uncountable) The science of finding, describing, classifying and naming organisms.

taxonomics
(science of finding, describing, classifying and naming organisms): alpha taxonomy

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