What's the difference between tenter and tetter?

Tenter

Definition:

• (n.) One who takes care of, or tends, machines in a factory; a kind of assistant foreman.
• (n.) A kind of governor.
• (n.) A machine or frame for stretching cloth by means of hooks, called tenter-hooks, so that it may dry even and square.
• (v. i.) To admit extension.
• (v. t.) To hang or stretch on, or as on, tenters.

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Tetter

Definition:

• (n.) A vesicular disease of the skin; herpes. See Herpes.
• (v. t.) To affect with tetter.

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