The word Wadling is misspelled against Waddling, which is present continuous of "Waddle"
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Waddling has double "dd" is mispronounced as "d"
Remember double 'DD' in between the strings Wa & ling which should not be misspelled with single 'D'
Wrong Spelling:  Wa-d-ling 
Correct Spelling:  Wa-dd-ling 
Find more wrongly spelled words of Waddling to spell it well.