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