oldwife vs oldwench

oldwife and oldwench both are nouns.

Word	Noun	Adjective	Verb	Adverb
oldwife	Yes	No	No	No
oldwench	Yes	No	No	No

As nouns, oldwife and oldwench are synonyms defined as:

Other synonyms of oldwife include Balistes vetula, Bessy cerca, queen triggerfish.

oldwife (noun)	oldwench (noun)
tropical Atlantic fish	tropical Atlantic fish
a common long-tailed sea duck of the northern parts of the United States