What's the difference between bodkin and threader?

Bodkin

Definition:

• (n.) A dagger.
• (n.) An implement of steel, bone, ivory, etc., with a sharp point, for making holes by piercing; a /tiletto; an eyeleteer.
• (n.) A sharp tool, like an awl, used for picking /ut letters from a column or page in making corrections.
• (n.) A kind of needle with a large eye and a blunt point, for drawing tape, ribbon, etc., through a loop or a hem; a tape needle.
• (n.) A kind of pin used by women to fasten the hair.
• (n.) See Baudekin.

Example Sentences:

• (1) A sign which appears to be almost specific for encasement, the bullet and bodkin configuration, is described here.

Threader

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.