As nouns the difference between screener and screeder
is that screener is one who, or that which, screens while screeder is a person who lays floor screeds.
screener
English
Noun
(
wikipedia screener)
(
en noun)
One who, or that which, screens.
An advance screening of a film sent to critics, awards voters, etc.
References
*http://www.schneier.com/blog/archives/2006/07/memoirs_of_an_a.html
*http://usgovinfo.about.com/bljobtsa.htm screeder
English
Noun
(
en noun)
A person who lays floor screeds
References
*OED 2nd edition 1989