different between undefeatability vs taxonomy

English

From un- +? defeat +? -ability.

undefeatability (uncountable)

The quality of being undefeatable; undefeatableness.
Synonyms: unbeatability, unbeatableness, (rare) undefeatableness, invincibility, invulnerability, impregnability

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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