The spelling of the word "ADER" is quite simple. It is spelled using the following IPA phonetic transcription: /ˈeɪdər/. The word is made up of four letters, with the first letter being "A" pronounced as /eɪ/, followed by "D" pronounced as /d/ and then "E" pronounced as /ə/, and finally the letter "R" pronounced as /ɹ/. When pronounced altogether, the word "ADER" sounds like "AY-der". It is important to note that the spelling of this word should not be confused with the word "adder", which means a type of snake.