What's the difference between futtock and puttock?

Futtock

Definition:

• (n.) One of the crooked timbers which are scarfed together to form the lower part of the compound rib of a vessel; one of the crooked transverse timbers passing across and over the keel.

Example Sentences:

Puttock

Definition:

• (n.) The marsh harrier.
• (n.) See Futtock.
• (n.) The European kite.
• (n.) The buzzard.

Example Sentences: