The word Eder is misspelled against Edder, a noun meaning "An adder or serpent."
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Edder has double "dd" is mispronounced as "d"
Remember double 'DD' in between the strings E & er which should not be misspelled with single 'D'
Wrong Spelling:  E-d-er 
Correct Spelling:  E-dd-er 
Explore spell check of Edder to spell without errors.