What's the difference between cathead and pinnace?

Cathead

Definition:

• (n.) A projecting piece of timber or iron near the bow of vessel, to which the anchor is hoisted and secured.

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Pinnace

Definition:

• (n.) A small vessel propelled by sails or oars, formerly employed as a tender, or for coast defence; -- called originally, spynace or spyne.
• (n.) A man-of-war's boat.
• (n.) A procuress; a pimp.

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