As nouns the difference between fetcher and fether
is that fetcher is a person or thing that fetches something while fether is archaic form of lang=en.
fetcher
English
Noun
(
en noun)
A person or thing that fetches something
* William Hairston, Passion and Politics
- More and more people agreed to help with the mailings, the hand-distribution of flyers, and telephonings. Others agreed to be gofers and fetchers .