What's the difference between threaden and threader?

Threaden

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Definition:

• (a.) Made of thread; as, threaden sails; a threaden fillet.

Example Sentences:

Threader

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Definition:

• (n.) A device for assisting in threading a needle.
• (n.) A tool or machine for forming a thread on a screw or in a nut.

Example Sentences:

• (1) The pretapped implant beds seemed to have a relatively smoother surface when the drill or threader and the screws had the same axis.