What's the difference between whiffletree and whippletree?

Whiffletree

Definition:

• (n.) Same as Whippletree.

Example Sentences:

Whippletree

Definition:

• (n.) The pivoted or swinging bar to which the traces, or tugs, of a harness are fastened, and by which a carriage, a plow, or other implement or vehicle, is drawn; a whiffletree; a swingletree; a singletree. See Singletree.
• (n.) The cornel tree.

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