Old woman and Oldwife

Old woman noun - A woman who is old.

Oldwife and old woman are semantically related. In some cases you can replace term "Oldwife" with "Old woman", this terms are similar.

Oldwife noun - A common long-tailed sea duck of the northern parts of the United States.

Old woman and oldwife are semantically related. You can use "Old woman" instead a noun "Oldwife".