Mader or Madder: How To spell?
The word Mader is misspelled against Madder, a noun meaning "A plant of the Rubia (R. tinctorum). The root is much used in dyeing red, and formerly was used in medicine. It is cultivated in France and Holland. See Rubiaceous."
Madder has double "dd" is mispronounced as "d"Remember double 'DD' in between the strings Ma & er which should not be misspelled with single 'D'
Wrong Spelling:  Ma-d-er  Correct Spelling:  Ma-dd-er 
Explore spell check of Madder to spell without errors.