What's the difference between averruncate and averruncator?

Averruncate

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Definition:

• (v. t.) To avert; to ward off.
• (v. t.) To root up.

Example Sentences:

Averruncator

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Definition:

• (n.) An instrument for pruning trees, consisting of two blades, or a blade and a hook, fixed on the end of a long rod.

Example Sentences: